Former FBI investigator thinks University of Idaho murder suspect had a ... trends now

University of Idaho murder suspect Bryan Kohberger may have been motivated to kill four students due to an 'incel complex,' a former FBI investigator claims.

Pete Yachmetz has posited that Kohberger may have been trying to 'assert some dominance' when he allegedly stabbed students Kaylee Goncalves, 21, Madison Mogen, 21, Ethan Chapin, 20, and Xana Kernodle, 20, at their off-campus home on November 13.

He noted that Kohberger, 28, had a history of social issues growing up in Pennsylvania — as his former classmates describe him as a troubled, disgruntled young man who didn't fit in at school.  

But Koberger has pleaded not guilty to the quadruple homicide in court, and his former lawyer says the evidence against him is circumstantial.

Speaking to the New York Post over the weekend, Yachmetz said he believes the brutality of the murders and Kohberger's history of social challenges may point to a possible motive.

'I believe a continued stabbing of a victim indicates ... an uncomfortable rage ad extreme anger,' he said, noting that Kohberger has been descried as 'socially awkward with a long history of interpersonal problems.

'I think he may have developed an incel complex,' Yachmetz said, 'The murders may have ben an effort to assert some type of dominance.'

The term 'incel' — short for 'involuntarily celibate — refers to men who have trouble establishing romantic relationships.

It is associated with misogynistic online tendencies and sometimes even crime, with Psychology Today reporting last year that men who identify as 'incels' tend have poor mental health and are more likely to experience feelings of victimhood, inferiority and loneliness.'

Dr. Carole Lieberman, a forensic psychologist, has previously suggested Kohberger fits the 'incel' profile.

'I've been saying from the beginning that he's an incel,' she said in an interview with CourtTV last week.

She explained she was largely convinced due to Kohberger's alleged 'choice of victims,' apparently targeting mostly female college students.

Additionally, Lieberman said, she was intrigued by evidence showing he returned to the scene just hours after the students were slain.

'Incels like to be known for when they kill people, or when they have a conquest like this,' she said. 'On the one hand, he wanted to commit the perfect crime and not be caught, but on the other hand, he did want to be caught and be proud, in a sense of what he did.' 

Former classmates of Kohberger's have told in recent weeks how he was a bullied, overweight kid who changed after high school.

Kim Kenley, 27, said the suspect developed a crush and began romantically pursuing the girl who would go on to be a high school cheerleader. 

Kohberger, then a chubby, awkward misfit, would become relentless in his pursuit, repeatedly leaving love letters in her locker and telling her he liked her, according to the mom. 

'He would always say, "Oh Kim, I think you're very pretty." Just like weird comments. And she'd say, "Oh my God, leave me alone,' her mother, Sandra, told DailyMail.com.

'She did not give him the time of day,' the mom noted. 'When kids are little, they're mean. They don't say, "Oh my god, thank you, but no."

Kenely would eventually tell Kohberger to buzz off, breaking his heart

At the time, former classmates said, Kohberger was heavy-set and the subject of bullying and cruel taunts.

'The whole clique of popular girls made fun of him in school. They were the cheerleaders and the ones that every kid had crushes on,' another classmate who did not wish to be identified told DailyMail.com. 

'They literally tortured him, girls started making fun of him in middle school.'

But Kohberger seemed to turn his life around in high school, where he took up boxing and lost weight. 

'He was a totally different person. He worked out constantly and was super aggressive,' the male friend said. 

'He had a short fuse and was constantly trying to change his style and personality to fit in with cliques.'

A third former classmate added: 'It's interesting to me that the girls he's accused of killing were nice looking and seemingly popular, much like the ones that made fun of him throughout his childhood.'