GRAND JUNCTION, Colo. (KREX)—

At the Crosby underpass just across the street from the Mesa County Sheriff’s Office, and on the other side of the concrete pillar by the train tracks, an innocent man was murdered in a violent frenzy while he lie sleeping bundled up against the cold night of February 27th, 2021.

The victim was 69-year-old Warren Barnes of Grand Junction, and the man on trial is 21-year-old, Brian Cohee Jr. who admitted to Barne’s murder and dismemberment.

A man typically tasked with guarding the U.S. President, took the stand on day seven of the People V Cohee because he’s also an expert in infiltrating electronic devices; in this case Cohee’s android smart phone.

Special Agent Derek Boothe with the Secret Service told prosecutors by employing software valued around $100,000 per year, he was able to break into Cohee’s phone by breaking down his passcode.

He says he received the phone, March 11th, 2021, and sent the cell back to Grand Junction detectives the very next day.

Then, Dr. Laura Serrano-Amerigo, a forensic psychologist who was face-to-face with Cohee for a psych evaluation, dropped a bomb on the defense.

She testified she specializes in NGRI cases, or (Not Guilty by Reason of Insanity), and says a person can have severe mental health issues, and still be legally sane.

Dr. Serrano-Amerigo conducted the analysis using body cam footage from the Blue Heron Boat ramp the night Cohee disposed of the body and the transcript from Cohee’s murder confession to investigators.

She says during the interview Cohee was not on any medication and had no signs of psychosis during his detailed account of the murder, or the doctor’s personality assessment. She started the analysis on May 22nd, 2021, and wrapped up about six weeks later.

Dr. Laura Serrano-Amerigo concludes Cohee does not meet the legal standard of insanity during the murder because she says he was not suffering from a mental disorder at the time of the murder.

But, the defense dismantled that bomb on Wednesday afternoon. Through her testimony, the defense showed Dr. Serrano-Amerigo conducted Cohee’s sane evaluation with a temporary permit less than a year after getting her PhD, and she’s not a specialist in neurodevelopmental disorders. Plus, Cohee was only her 4th sane evaluation at the time, according to Dr. Serrano-Amerigo’s testimony.