The suspect charged over the University of Idaho murders worried his family with "very, very weird" eating habits, a relative has said.
Bryan Kohberger was arrested on Friday December 30, six weeks after four students were stabbed to death in their Moscow, Idaho, US, rental student home.
Since the arrest people have spoken out about the character of the suspect with a former-aunt mentioning his bizarre diet.
The woman, who used to be married into the family, told the New York Post that his veganism went "above and beyond" the ordinary.
She said: “His aunt and uncle had to buy new pots and pans because he would not eat from anything that had ever had meat cooked in them. He seemed very OCD".
OCD stands for obsessive-compulsive disorder, common condition where a person will repeat tasks or behaviours again and again.
She described his diet as “very, very weird” and that “it was above and beyond being vegan”.
Kohberger is being held without bond in Pennsylvania, Prosecutor Thompson said, and the affidavit for four charges of first-degree murder in Idaho will remain sealed until he is returned.
He is also charged with felony burglary in Idaho.
He is a PhD student in the Department of Criminal Justice and Criminology at Washington State University, Pullman, just a 15 minute driver from Moscow.
The two universities are partners in several academic programmes but the University of Idaho President Scott Green wrote in a memo to students and employees on Friday evening that Idaho had no record of Kohberger.
A neighbour of the accused murderer has opened up about how Kohberger usually kept to himself but was active during the early hours of most days.
The neighbour, who wanted to remain anonymous, told New York Post: "He’s normally a very late night person, going to the bathroom and vacuuming at 1 or 12 in the morning.
"I have kids, so sometimes I thought of speaking to him or complaining, but never did.
"It seemed like he never slept because he was always doing something all night."
The woman, who lived in the apartment below Kohberger with her husband, admitted both were stunned when the criminology student from Washington State University Pullman was named as a suspect.
She added: "I don’t know how he could’ve killed people because he doesn’t look that tough.
"We are all PhD students here so it takes a lot of hard work and smarts to get to this point.
"You don’t think someone like that could do something like this."