Dayton shooter Connor Betts killed his 22-year-old sister during rampage outside bar: Police

The suspect who opened fire outside a crowded bar in downtown Dayton, Ohio, killed his own sister during the attack, which left nine people dead and 27 more injured, according to authorities.

Megan Betts, 22, was killed around 1:05 a.m. Sunday after her brother, 24-year-old Connor Betts, attacked revelers outside Ned Peppers Bar with a .223-caliber rifle, armed with multiple 100-round capacity magazines.

Dayton Police Chief Richard Biehl said Monday the shooter's motive remains unclear but added that authorities don't see how he could have killed his sister at random, according to ABC News.

"It seems to just defy believability that he would shoot his own sister, but it's also hard to believe that he didn't recognize that was his sister," Biehl said. "So we just don't know."

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9 killed in Ohio in second mass shooting within 24 hours
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9 killed in Ohio in second mass shooting within 24 hours
Authorities work the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Shoes are piled outside the scene of a mass shooting including Ned Peppers bar, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Authorities work the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Authorities work at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Authorities work at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Bodies are removed from at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Autoridades trabajando en el lugar de un tiroteo masivo, el domingo 4 de agosto de 2019 en Dayton, Ohio. (AP Foto/John Minchillo)
Bodies are removed from at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Witnesses comfort one another at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Dayton Mayor Nan Whaley speaks during a news conference regarding a mass shooting earlier in the morning, Sunday, Aug. 4, 2019, in Dayton, Ohio. At least nine people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Bodies are removed from at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Shoes are piled outside the scene of a mass shooting including Ned Peppers bar, Sunday, Aug. 4, 2019, in Dayton, Ohio. Several people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
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Megan and her brother, both of Bellbrook, had traveled to the Oregon District, a popular nightlife area, together in the same car with another male companion before separating at some point over the course of the evening, NBC News reports.

Connor later returned from an alleyway near where the vehicle was parked wearing a bulletproof vest and hearing protection and opened fire. His sister and the male companion, whose identity has not been released, were the second and third victims gunned down, police say. The male survived the attack and is reportedly cooperating with authorities.

Responding officers engaged and killed the shooter "instantaneously and effectively," ending the rampage "in 30 seconds" and preventing much more bloodshed, Chief Biehl told reporters after the attack.

"Had this individual made it through the doorway of Ned Peppers with that level of weaponry, there would have been catastrophic injuries and a loss of life," he added.

A friend of Megan's, 20-year-old Dana Raber, told reporters Sunday the victim was "wonderful" and "different in a very good way."

"That's why we got along, I supposed," Raber recalled. "She's very sweet, had her own opinions and was loud and kind in a way that her brother was quiet and stayed more to himself."

Raber also said she was unaware of any issues between Megan and her brother that could have prompted the fatal incident. 

"They are a family I admired, and I don't know how they're going to get through this," she said. "They were always very nice to me."

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Dayton, Ohio shooting: Families, locals and more mourn the victims
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Dayton, Ohio shooting: Families, locals and more mourn the victims
Jamila McNichols, sister of slain mass shooting victim Thomas "TJ" McNichols, mourns beside a memorial near the scene of the mass shooting Monday, Aug. 5, 2019, in Dayton, Ohio. (AP Photo/John Minchillo)
Family members of slain mass shooting victim Thomas "TJ" McNichols, from left, Donna Johnson, aunt, and sisters Jamila and Finesse McNichols, mourn beside a memorial near the scene of the shooting Monday, Aug. 5, 2019, in Dayton, Ohio. (AP Photo/John Minchillo)
A mourner prays his rosary beads beside a memorial outside Ned Peppers bar that was the scene of a mass shooting the previous day Monday, Aug. 5, 2019, in Dayton, Ohio. (AP Photo/John Minchillo)
Finesse McNichols, sister of slain mass shooting victim Thomas "TJ" McNichols, mourns beside a memorial near the scene of the crime, Monday, Aug. 5, 2019, in Dayton, Ohio. (AP Photo/John Minchillo)
Mourners gather outside Ned Peppers bar that was the scene of a mass shooting the previous day, Monday, Aug. 5, 2019, in Dayton, Ohio. (AP Photo/John Minchillo)
Mourners pause for a prayer as they gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners visit a makeshift memorial outside Ned Peppers bar following a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at the scene of a mass shooting during a vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners visit a makeshift memorial outside Ned Peppers bar following a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
A makeshift memorial is setup outside Ned Peppers bar following a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners comfort one another during a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Ohio Gov. Mike DeWine, left, speaks alongside Dayton Mayor Nan Whaley, right, during a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners sing as they participate in a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Balloons are released as mourners gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Dayton Mayor Nan Whaley speaks during a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners light candles as they participate in a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners light candles as they participate in a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. A masked gunman in body armor opened fire early Sunday in the popular entertainment district in Dayton, killing several people, including his sister, and wounding dozens before he was quickly slain by police, officials said. (AP Photo/John Minchillo)
Mourners bow their heads in prayer as they gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners bow their heads in prayer as they gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners bow their heads in prayer as they gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Doves are released over gathered mourners during a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners bow their heads in prayer as they gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Mourners gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
Flowers are placed at the front of a business as mourners gather at the scene of a mass shooting before a prayer vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at the scene of a mass shooting before a vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
A tight bullet pattern remains in the window of a storefront as mourners gather at the scene of a mass shooting before a vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio were killed in the second mass shooting in the U.S. in less than 24 hours. (AP Photo/John Minchillo)
A mourner places flowers at the front of Ned Peppers bar as they gather at the scene of a mass shooting before a prayer vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners hugs at the front of Ned Peppers bar while they gather at the scene of a mass shooting before a prayer vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners place flowers and candles at the front of Ned Peppers bar while they gather at the scene of a mass shooting before a prayer vigil, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
Mourners gather at a vigil following a nearby mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Multiple people in Ohio have been killed in the second mass shooting in the U.S. in less than 24 hours, and the suspected shooter is also deceased, police said. (AP Photo/John Minchillo)
DAYTON, OHIO - AUGUST 05: Annette Gibson-Strong cries after visiting a memorial to those killed in yesterday's mass shooting in the Oregon District on August 05, 2019 in Dayton, Ohio. Nine people were killed and another 27 injured when a gunman identified as 24-year-old Connor Betts opened fire with an AR-15 style rifle in the popular entertainment district. Betts was subsequently shot and killed by police. The shooting happened less than 24 hours after a gunman in El Paso, Texas opened fire at a shopping mall killing 22 people. (Photo by Scott Olson/Getty Images)
DAYTON, OHIO - AUGUST 05: Annette Gibson-Strong visits a memorial to those killed in yesterday's mass shooting in the Oregon District on August 05, 2019 in Dayton, Ohio. Nine people were killed and another 27 injured when a gunman identified as 24-year-old Connor Betts opened fire with a AR-15 style rifle in the popular entertainment district. Betts was subsequently shot and killed by police. The shooting happened less than 24 hours after a gunman in El Paso, Texas opened fire at a shopping mall killing 22 people. (Photo by Scott Olson/Getty Images)
DAYTON, OHIO - AUGUST 05: A memorial to those killed in yesterday's mass shooting sits along the sidewalk in the Oregon District on August 05, 2019 in Dayton, Ohio. Nine people were killed and another 27 injured when a gunman identified as 24-year-old Connor Betts opened fire with a AR-15 style rifle in the popular entertainment district. Betts was subsequently shot and killed by police. The shooting happened less than 24 hours after a gunman in Texas opened fire at a shopping mall killing 22 people. (Photo by Scott Olson/Getty Images)
DAYTON, OHIO - AUGUST 05: A memorial to yesterday's shooting victims sits in the Oregon District following on August 05, 2019 in Dayton, Ohio. Nine people were killed and another 27 injured when a gunman identified as 24-year-old Connor Betts opened fire with a AR-15 style rifle in the popular entertainment district. Betts was shot and killed by police. The shooting happened less than 24 hours after a gunman in Texas opened fire at a shopping mall killing 20 people. (Photo by Scott Olson/Getty Images)
DAYTON, OHIO - AUGUST 05: A mourner prays at a makeshift memorial in the Oregon District following yesterday's mass shooting on August 05, 2019 in Dayton, Ohio. Nine people were killed and another 27 injured when a gunman identified as 24-year-old Connor Betts opened fire with a AR-15 style rifle in the popular entertainment district. Betts was shot and killed by police. The shooting happened less than 24 hours after a gunman in Texas opened fire at a shopping mall killing 20 people. (Photo by Scott Olson/Getty Images)
DAYTON, OHIO - AUGUST 05: Mourners pray at a makeshift memorial in the Oregon District following yesterday's mass shooting on August 05, 2019 in Dayton, Ohio. Nine people were killed and another 27 injured when a gunman identified as 24-year-old Connor Betts opened fire with a AR-15 style rifle in the popular entertainment district. Betts was shot and killed by police. The shooting happened less than 24 hours after a gunman in Texas opened fire at a shopping mall killing 20 people. (Photo by Scott Olson/Getty Images)
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