Transcript from new book ‘Broken Plea’ shows Maryann Kohberger told agents she’d ‘stake my life’ on his innocence

After a Pennsylvania State Police SWAT team stormed her home in the Poconos in December 2022, Maryann Kohberger told investigators she believed they’d made a “really, really bad mistake” and that her suspected murderer son was an “angel.”

They had just arrested Bryan Kohberger, who was accused of stabbing four University of Idaho undergrads in Moscow, Idaho. Three were still asleep when they were attacked.

“He’s my angel,” Maryann Kohberger told three FBI agents, according to a partial transcript of her interview revealed in Christopher Whitcomb’s new book, “Broken Plea.”

She spoke with them voluntarily at the Pennsylvania State Police Fern Ridge Barracks in Blakeslee, about 8 miles from the family home in Albrightsville. Police took Kohberger’s parents there as they served a search warrant at the house.

Maryann Kohberger wearing sunglasses and Amanda Kohberger exiting Ada County Courthouse in Boise Idaho

Maryann Kohberger, mother of Bryan Kohberger, and daughter Amanda Kohberger leave the Ada County Courthouse in Boise, Idaho, July 23, 2025, after Bryan Kohberger’s sentencing for the murders of four University of Idaho students in November 2022. (Derek Shook/Fox News Digital)

“My son would not do this,” Maryann Kohberger insisted, in response to a question from FBI Special Agent Matthew Phillips. “I will stake my life on that. There’s a mistake, something is wrong somewhere. And that’s what I believe. And that’s what I know in my heart.”

Special Agent Jessica Mahoney was also involved in the interview.

Bryan Kohberger wearing a prison uniform at the Ada County Courthouse in Boise

Bryan Kohberger appears at the Ada County Courthouse in Boise, Idaho, July 23, 2025, for his sentencing hearing for the stabbing deaths of four University of Idaho students nearly three years earlier. (Kyle Green/AP Photo)

“You say that he’s, uh, an angel. He’s kind. He’s your baby,” she told Maryann Kohberger. “Does he have any anger issues ever?”

The book does not directly quote her response, but Whitcomb wrote that she denied her son had anger issues or had shown confrontational behavior. This appears to contradict allegations against him from fellow students at Washington State University, where he was a Ph.D. student in criminology who also worked as a teacher’s aide.

Mahoney asked if Kohberger had a girlfriend or boyfriend. His mother said he wasn’t dating anyone at the time and had only had “a couple” of prior girlfriends.

Madison Mogen smiling on Kaylee Goncalves' shoulders with Ethan Chapin, Xana Kernodle, and two other housemates posing for a photo

University of Idaho students Madison Mogen, Kaylee Goncalves, Ethan Chapin, Xana Kernodle and two other housemates pose in the final photo shared by Goncalves on Instagram before four students were fatally stabbed in November 2022. (Kaylee Goncalves/Instagram)

She admitted her son had few friends and said she was thankful that he’d overcome a past heroin addiction. However, she claimed he was “making friends” at WSU. She could only name one, described in the book only as an international student and one of his classmates in the criminology program.

She also told the agents Kohberger’s semester in Pullman, Washington, was the first time he’d lived alone. He had few hobbies, stayed up late and was organized when it came to work but not always tidying up his room, she told them.

“What’s going through my mind right now is that this is a really, really bad mistake, what’s going on, like what’s happening here,” she told the agents.

Bryan Kohberger standing in court with his attorney at Ada County Courthouse

Bryan Kohberger appears at the Ada County Courthouse in Boise, Idaho, July 23, 2025, for his sentencing hearing for the stabbing deaths of four University of Idaho students nearly three years earlier. (Kyle Green/AP)

Phillips later warned her “there is a lot of evidence,” enough probable cause to authorize the warrant served on her home that landed her son in handcuffs.

“This is a nightmare,” she said at another point.

Years later, she would sit in the front row as her son confessed to the murders of four innocent college students — Madison Mogen, 21, Kaylee Goncalves, 21, Xana Kernodle, 20, and Ethan Chapin, 20.

Maryann Kohberger wearing black coat with fur-lined hood is helped to car by two younger women outside Monroe County Court House

Maryann Kohberger exits the Monroe County Courthouse in Stroudsburg, Pa., Jan. 3, 2023, after her son Bryan Kohberger’s extradition hearing. (The Image Direct for Fox News Digital)

There is no known motive in the case after he took a plea deal to avoid the risk of the potential death penalty at trial.

He is serving four consecutive terms of life in prison without the possibility of parole, one for each of the murders, plus another 10 years for breaking into the home.

Pennsylvania authorities previously declined to divulge the full interview transcript and other records requested by Fox News Digital surrounding Kohberger’s arrest, citing an exemption under state law.

Attempts to reach Kohberger’s parents were unsuccessful.