Fox Lake officer was shot with his own weapon, commander says

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Officials: Fox Lake Officer Shot Twice With Own Weapon

FOX LAKE, Ill. (WGN) — There are several new developments in the investigation into the death of Fox Lake Police Lieutenant Joe Gliniewicz.

The lead investigator revealed on Thursday the fallen officer was shot twice with his own weapon, and there were signs of a struggle at the scene. The first shot knocked him out, and the second one is believed to have killed him. No word, though, on how the gun went off.

SEE MORE: Promising lead in Fox Lake officer's slaying comes up empty

Authorities also disclosed they have recovered nine pieces of unknown DNA from the scene. One of those samples has already been confirmed as belonging to a male.

They also believe Gliniewicz was at the scene 20 minutes before he radioed that he saw three men, two white and one black.

Click through to see more from the manhunt for Lt. Gliniewicz's killer:

18 PHOTOS
Illinois Manhunt, Fox Lake Police Lt. Charles Joseph Gliniewicz
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Fox Lake officer was shot with his own weapon, commander says
FOX LAKE, IL - SEPTEMBER 02: Residents and police from Fox Lake and surrounding communities attend a vigil for slain Fox Lake police officer Lt. Joe Gliniewicz on September 2, 2015 in Fox Lake, Illinois. Gliniewicz was shot and killed yesterday during a foot chase with three suspects who remain at large. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 02: Officers salute as the family of slain Fox Lake police officer Lt. Joe Gliniewicz arrive for a vigil held in his honor on September 2, 2015 in Fox Lake, Illinois. Gliniewicz was shot and killed yesterday during a foot chase with three suspects. (Photo by Scott Olson/Getty Images)
Police officers meet up before heading out for a manhunt on Tuesday, September 1, 2015 in Fox Lake, Ill. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Police officers search an area for suspects involved in shooting an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Police officers get get a break after coming off a search mission as temperatures exceeded 90 degrees during a manhunt for three suspects in the murder of a Fox Lake Police officer on September 1, 2015 in Fox Lake, Illinois. Lt. Joe Gliniewicz was found with a gunshot wound shortly after the department lost radio communication with him during a foot chase of three suspects. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Police officers search an area for suspects involved in the shooting death of an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: A police sniper keeps watch from the roof of a home while other police search nearby for suspects involved in the shooting of an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Police officers search an area for suspects involved in shooting an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: A police officers looks out across a search area as the manhunt continues for three suspects in the murder of a Fox Lake Police officer on September 1, 2015 in Fox Lake, Illinois. Lt. Joe Gliniewicz was found with a gunshot wound shortly after the department lost radio communication with him during a foot chase of three suspects. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Sisters Brittany (L) and Renee Evans join other residents in showing their support as the manhunt continues for three suspects in the murder of a Fox Lake Police officer on September 1, 2015 in Fox Lake, Illinois. Lt. Joe Gliniewicz was found with a gunshot wound shortly after the department lost radio communication with him during a foot chase of three suspects. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: A police officer searches an area for suspects involved in shooting an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
A sniper and a lookout stand on top of a roof searching for two men following the killing of a police officer Tuesday, Sept. 1, 2015 in Fox Lake, Ill. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
Police officers search for suspects after a police officer was shot on Tuesday, September 1, 2015 in Fox Lake, Ill. (Joe Shuman/Chicago Tribune/TNS via Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Police officers search an area for suspects involved in shooting an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: Police officers search an area for suspects involved in the shooting death of an officer September 1, 2015 in Fox Lake, Illinois. A manhunt for three suspects is underway after an officer from Fox Lake Police was shot and killed this morning. (Photo by Scott Olson/Getty Images)
FOX LAKE, IL - SEPTEMBER 01: A police officer cools down his search dog as temperatures exceeded 90 degrees during a manhunt for three suspects in the murder of a Fox Lake Police officer on September 1, 2015 in Fox Lake, Illinois. Lt. Joe Gliniewicz was found with a gunshot wound shortly after the department lost radio communication with him during a foot chase of three suspects. (Photo by Scott Olson/Getty Images)
Police officers patrol a swampy area where a manhunt is taking place on Tuesday, September 1, 2015 in Fox Lake, Ill. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
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Lt. Gliniewicz was found September 1st after he radioed that he was pursuing three suspicious men in a remote area of the village south of the state line. Despite a massive manhunt, police haven't made any arrests or identified any suspects.

Authorities emphasized the investigation was being conducted as a homicide probe, though detectives weren't ruling anything out, including the possibility of suicide.

See images from Lt. Gliniewicz's funeral:

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Illinois cop funeral Lt. Charles Joseph Gliniewicz
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Fox Lake officer was shot with his own weapon, commander says
Jeff Jacobs of the Illinois State Police and Leroy Pugesek of the Lake County Sheriff's Office hug outside the funeral of slain Fox Lake police Lt. Charles Joseph Gliniewicz at Antioch Community High School on Monday, Sept. 7, 2015 in Antioch, Ill. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
Covered in an American flag, the casket of slain Fox Lake police Lt. Charles Joseph Gliniewicz arrives at Antioch Community High School on Monday, Sept. 7, 2015 in Antioch, Ill. The man in the maroon beret is Lt. Gliniewicz's son. Thousands of police officers and residents are expected to attend his funeral later this morning at the school. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
Hundreds of people get in line to pay their respects to slain Fox Lake police Lt. Charles Joseph Gliniewicz at Antioch Community High School on Monday, Sept. 7, 2015 in Antioch, Ill. Thousands of police officers and residents are expected to attend Gliniewicz's visitation and funeral today. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
Ron Flug, foreground, ride captain of the Patriot Guards leads the group to Antioch High School for the funeral of Fox Lake police Lt. Charles Joseph Gliniewicz on Monday, Sept. 7, 2015 in Antioch, Ill. (Brian Nguyen/Chicago Tribune/TNS via Getty Images)
Law enforcement officers salute the casket of Fox Lake police Lt. Charles Joseph Gliniewicz as it is wheeled into Antioch Community High School on Monday, Sept. 7, 2015 in Antioch, Ill. (Brian Nguyen/Chicago Tribune/TNS via Getty Images)
Covered in an American flag, the casket of slain Fox Lake police Lt. Charles Joseph Gliniewicz arrives at Antioch Community High School on Monday, Sept. 7, 2015 in Antioch, Ill. Thousands of police officers and residents are expected to attend his funeral later this morning at the school. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
A memorial is in place at the Fox Lake Police Department on Sept. 2, 2015 in Fox Lake, Ill. Police are searching for a second day to locate three suspects in the killing of Fox Lake Lt. Charles Joseph 'G.I. Joe' Gliniewicz. (Jose M. Osorio/Chicago Tribune/TNS via Getty Images)
Tara England of Ingleside and her 11 year-old son pray in front of the memorial for slain Fox Lake police Lt. Charles Joseph 'G.I. Joe' Gliniewicz on Wednesday, Sept. 2, 2015 in Fox Lake, Ill. Three suspects still remain at large and a manhunt is underway in the area. (Stacey Wescott/Chicago Tribune/TNS via Getty Images)
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