christina hager has more. >> reporter: it was a tough scene in court today. according to the district attorney, the teenager was so troubled in court, he refused to approach the doctor for his arraignment. they had to force him. >> what made this nurse's teenage son allegedly turn on her so violently? >> i am interested in finding out what happened, what the motive is. >> the 18-year-old was out of camera's view during his court arraignment but this is his police mugshot. according to court documents the recent grad had been going through depression, stopped eating and days ago refused to board a plane when his mother bought a ticket for him to >> the grandmother said he was sick. >> she called 911. police stopped by to talk with her today. she says the victim's mother ran to her house grabbed her and pulled her to the murder scene to help. she saw him come out. we showed her what he looked like in court. >> does that look like what you saw? >> to me his eyes were really bugging like his eyes were really open wide family's home where a friend stood stunned. >