EXCLUSIVE: Dr. Phil defends JonBenet Ramsey's brother Burke for smiling during interview: 'It's purely from anxiety'


Dr. Phil is standing by Burke Ramsey.

Audiences have reacted strongly to the talk show host's three-part interview with JonBenet Ramsey's brother, in particular the 29-year-old's seemingly inappropriate smiling while discussing his sister's murder. However, Dr. Phil insists Burke's smile is just a result of anxiety.

WATCH: JonBenet Ramsey's Brother and Father Address Theories of Who Killed Her: 'I Know We Were Suspects'

ET caught up with Dr. Phil on Thursday, where he spoke more about Burke, and defended him against naysayers.

"Burke is not and has never been a suspect in this case," he simply stated. "I think people have considered him otherwise because, in the very beginning, the DA and the Boulder PD have acknowledged and admitted they put out misinformation to the media, to the public, to try to put pressure on the Ramseys to either make a mistake or break or confess."

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289830 05: The site where 6 year old Jonbenet Ramsey was killed in Boulder, Colorado, 1996. (Photo by Karl Gehring/Liaison)
Aug. 17, 2006 - JONBENET RAMSEY.SUPPLIED BY JONBENETRAMSEYRETRO(Credit Image: © Globe Photos/ZUMAPRESS.com)
318902 01: People light candles at the murder site of 6 year old Jonbenet Ramsey in Boulder, Colorado, December 1997. (Photo by Karl Gehring/Liaison)
BOULDER, CO - MAY 01: John and Patsy Ramsey, the parents of JonBenet Ramsey, meet with a small selected group of the local Colorado media after four months of silence in Boulder, Colorado on May 1, 1997. Their 6-year-old daughter was found dead on Christmas night 1996. (Photo By Helen H. Richardson/ The Denver Post)
BOULDER, CO - MAY 01: John and Patsy Ramsey, the parents of JonBenet Ramsey, meet with a small selected group of the local Colorado media after four months of silence in Boulder, Colorado on May 1, 1997. Patsy holds up a reward sign for information leading to the arrest of their daughter's murderer. Their 6-year-old daughter was found dead on Christmas night 1996. (Photo By Helen H. Richardson/ The Denver Post)
BOULDER, CO - MAY 01: John and Patsy Ramsey, the parents of JonBenet Ramsey, meet with a small selected group of the local Colorado media after four months of silence in Boulder, Colorado on May 1, 1997. Their 6-year-old daughter was found dead on Christmas night 1996. (Photo By Helen H. Richardson/ The Denver Post)
8/27/1998 Colorado Jonbenet Ramsey House In Boulder. (Photo By Karl Gehring/Getty Images)
BOULDER, CO - MAY 01: John and Patsy Ramsey, the parents of JonBenet Ramsey, meet with a small selected group of the local Colorado media after four months of silence in Boulder, Colorado on May 1, 1997. Their 6-year-old daughter was found dead on Christmas night 1996. (Photo By Helen H. Richardson/ The Denver Post)
Murdered 6-yr-old beauty queen JonBenet Ramsey's image amblazoned on dozens of binders crammed w. investigators's reports for case which still unsolved after 6 months, in Sheriff's office (Photo by Ray Ng/The LIFE Images Collection/Getty Images)
ATLANTA - AUGUST 16: Lib Waters places a note on the grave of JonBenet Ramsey August 16, 2006 in Marietta, Georgia. A suspect in the murder of Ramsey, the 6-year-old beauty queen whose parents were under suspicion early on, has been arrested in Thailand. The note Waters left reads: 'Dearest Patsy, Justice has come for you + John. Rest in Peace. Your friend, Lib Waters.' (Photo by Barry Williams/Getty Images)
Bangkok, THAILAND: US teacher John Mark Karr (C), 41, flanked by Thai police, walks towards a van on his way to the airport from a detention center at the Thai Immigration Department in Bangkok, 20 August 2006. Thai authorities deported the US teacher arrested here over the 1996 killing of child beauty queen JonBenet Ramsey, amid serious doubts about his involvement in the brutal crime. Karr was arrested 16 August 2006 in connection with the slaying of six-year-old JonBenet, who was found strangled and beaten to death in the basement of her family's Colorado home on the day after Christmas 1996. AFP PHOTO/ Saeed KHAN (Photo credit should read SAEED KHAN/AFP/Getty Images)
LOS ANGELES - AUGUST 22: John Mark Karr, the suspect in the killing of child beauty queen JonBenet Ramsey, appears at an extradition hearing at the Los Angeles Superior Court August 22, 2006 in Los Angeles, California. Karr agreed to be extradited to Colorado to face charges of murder, kidnapping and sexual assault in the JonBenet Ramsey case. (Photo by Mario Anzuoni-Pool/Getty Images)
BOULDER, CO - AUGUST 28: Karen Salaz, spokesperson for the Colorado state court system, approaches the news media with copies of a release announcing that charges against John Mark Karr in connection with JonBenet Ramsey murder case were dropped August 28, 2006 in Boulder, Colorado. A DNA sample taken from Karr after he arrived in the U.S from Thailand where he was arrested last week did not match a sample taken at the murder scene. Ramsey is the six-year-old beauty queen found murdered in the basement of her Boulder, Colorado home the day after Christmas in 1996. Karr could still face unrelated child pornography charges in California. (Photo by Thomas Cooper/Getty Images)
Dec 26, 1997 - Marietta, Georgia, USA - JonBenet Ramsey grave on one year anniversary of her death. Former Little Miss Colorado JonBenet Patricia Ramsey (8/6/90-1996-12-25), was found strangled in the basement of her family's home in Boulder, Colorado, Thursday, Dec. 26, 1996. 
Marietta, GA -- JonBenet Ramsey would've turned twenty years old this week. The child beauty pageant star was mysteriously killed on Christmas, 1996 in Boulder, Colorado. She was six years old. Dozens of theories abound, but no one has ever been charged with her murder.
Aug 20, 2006; Los Angeles, CA, USA; Members of the news media gather at the arrival area of Los Angeles International Airport to interview passengers arriving from the same flight with John Mark Karr, the suspect in the killing of 6-year-old JonBenet Ramsey on Sunday, Aug. 20, 2006. 
John Mark Karr (C) is taken into a court room with his attorney Rob Amparan before his bail hearing in Santa Rosa, California, September 19, 2006. Karr, the schoolteacher who made worldwide headlines by confessing to one of America's most notorious unsolved crimes, the murder of six-year-old JonBenet Ramsey, is now facing charges of five counts of possessing child pornography. REUTERS/John Burgess/Pool (UNITED STATES)
FILE - In this June 29, 2006, file photo, John Ramsey hugs his son, Burke, facing camera, at the graves of his wife, Patsy, and daughter JonBenet, during services for his wife at the St. James Episcopal Cemetery in Marietta, Ga. Burke Ramsey discussed his sister's death with TV's "Dr. Phil" in an interview broadcast on Monday, Sept. 12, 2016. (AP Photo/Ric Feld, File)
FILE - In this Aug. 28, 2000 file photo, John and Patsy Ramsey leave their attorney Lin Wood's offices during a break in the Ramsey's questioning by Boulder, Colo., authorities in Atlanta. CBS is getting in the true crime business by investigating the JonBenet Ramsey murder in an upcoming six-part docuseries, the network announced Wednesday, Aug. 10, 2016. Their six-year-old daughter was found dead in her Colorado home on Dec. 26, 1996 after her parents reported her kidnapped. (AP Photo/Gregory E. Smith, File)
FILE - This Aug. 30, 2006, file photo, shows the exterior of the Boulder, Colo., home where JonBenet Ramsey was murdered in 1996. In his most extensive comments on the Ramsey case, retired Boulder Police Chief Mark Beckner says officers botched the initial handling of the crime scene. Beckner participated in an "Ask Me Anything" session on the social-networking and news site Reddit Saturday, Feb. 21, 2015, and told the Boulder Daily Camera on Tuesday, Feb. 24, that he didn't realize his comments would filter out to the rest of the world. (AP Photo/Paul Sakuma, File)
Boulder County Chief Public Defender Seth Temin, driving, smiles as he leaves a courtroom in his car with Deputy Public Defender Yasmin Forouzandeh, after an extradition hearing for John Mark Karr at the Boulder County Justice Center in Boulder, Colo., Tuesday, Aug. 29, 2006. Karr was a school teacher who claimed to have been present when JonBenet Ramsey was killed in 1996. (AP Photo/Paul Sakuma)
Patsy Ramsey's sister Paulette Davis brushes off the grave of JonBenet Ramsey at the St. James Episcopal Cemetery in Marietta, Ga., Thursday, Aug. 17, 2006. A man arrested in Thailand is being held in connection with the slaying of JonBenet Ramsey, U.S. officials said Wednesday, Aug. 16, 2006. The girl was found beaten and strangled in the basement of the family's home in Boulder, Colo., on Dec. 26, 1996. (AP Photo/Wilford A. Harewood)
Attendees pay their respects at the graves of Patsy Ramsey, and daughter, JonBenet, during services for Patsy Ramsey at the St. James Episcopal Cemetery in Marietta, Ga., Thursday, June 29, 2006. Patsy Ramsey died Saturday after a long battle with ovarian cancer. (AP Photo/Ric Feld)
Candles surround a portrait of JonBenet Ramsey outside her home after a candlelight vigil on the one-year anniversary of her murder Friday, Dec. 26, 1997, in Boulder, Colo. About 60 people gathered for the vigil. (AP Photo/Michael S. Green)
John Ramsey looks on as his wife, Patsy, holds an advertisement promising a reward for information leading to the arrest and conviction of the murderer of their 6-year-old daughter, JonBenet, during an interview Thursday, May 1, 1997, in Boulder, Colo. It was the Ramsey's first meeting with reporters since the days after their daughter was found slain in the basement of their family's home in Boulder, Colo., on Dec. 26, 1996. No arrests have been made in the girl's death. (AP Photo/Rocky Mountain News, Patrick Davison) PLEASE CREDIT: Patrick Davidson, Rocky Mountain News
Shrouded by trees near, an unidentified investigator uses a tape measure on the Ramsey family home early Tuesday, July 1, 1997, while gathering information to construct an architectural model of the 6,000-square-foot, Tudor-style home in which JonBenet Ramsey was murdered more than six months ago in Boulder, Colo. Boulder police, along with district attorney investigators and members of the Colorado Bureau of Investigation, have been scruntinizing the home since Monday and may be in the home for up to a week. (AP Photo/David Zalubowski)
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"Burke has been the missing link in this whole thing because in 20 years, he's never spoken," he continued. "He is, as I say, the only other person known in the house."

JonBenet's body was found on Dec. 26, 1996 in the basement of her family's Colorado home by her father, John, hours after police had already searched the home. John and his wife, Patsy, had initially contacted police upon discovering a ransom note demanding $118,000 for the 6-year-old beauty queen's safe return. John, Burke and Patsy -- who died of ovarian cancer in 2006 -- were ultimately cleared of any wrongdoing by police in 2008.

WATCH: JonBenet Ramsey's Brother Burke Reveals Why He Stayed in His Room After Sister Went Missing

As for Burke's critics, who find his ability to smile when talking about his sister's murder unsettling, Dr. Phil says he's just shy.

"People have commented on his smile, which is purely from anxiety," he explained. "He's kind of a loner. He's socially uncomfortable."

"When people are anxious, they do different things. They pull on their hair or fiddle around, or whatever... for him, it's a nervous smile," he said, adding that he thinks some have gotten used to Burke's seemingly odd facial expression. "I think they've gotten past that and listened to the sincerity of his answers and said, 'OK, he's just nervous.'"

Dr. Phil also offered insight into Burke's life at home, saying that while he's been "moved around" and "lived in isolation," he now "has a very nice life."

"He's a very private individual, but he has a great career and has a good relationship with his father," he shared. "They're not together all the time. They live half a country apart."

WATCH: EXCLUSIVE: Dr. Phil Asks Burke Ramsey if He Murdered JonBenet in Upcoming Interview

Instead, Dr. Phil says Burke is keeping himself busy with a job in the computer industry, and enjoying the company of his girlfriend. "He's in a relationship with a very nice young woman," he said, adding that he was shocked by Burke's "brilliance."

"He works in [computer] security, and I started asking him questions. I wasn't through the second question before he was so far beyond my understanding, I just kind of glazed over," Dr. Phil recalled. "He's very bright, very sophisticated, very well educated, and very sophisticated in what he does, and has a lot of pride in it actually."

"The interesting thing about the passage of time is you don't have to speculate about who someone is. It's been 20 years since this happened and in that time, Burke's never been in trouble with the law. He's never had any problem with assault or violence or anything like that. It's totally consistent with him not being a suspect," he concluded, before teasing viewers with what lies ahead in the final installment of his interview with Burke.

"On our final episode, what you're going to hear is Burke's very specific theory about who killed his sister," he promised.

WATCH: JonBenet Ramsey's Brother Speaks Out on Sister's Unsolved Murder Nearly 20 Years After Her Death

Part three of Dr. Phil's interview with Burke will air Monday, Sept. 19.

See more about Burke's interview in the video above.

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