He'll absolutely not be convicted of murder, and probably not even of manslaughter. Some bleeding-heart jury will buy into him being "suicidal" and his defense attorney's claim (backed up by the hired-gun psychiatrist) that he lacked judgment at the time and didn't understand the wrong of his actions.
What a joke. Hey, buddy! Truly suicidal people succeed in the act. They don't make lame attempts at suicide by driving onto a railroad track, then jumping out at the last moment, only to follow that by making superficial scratches on their wrists and stabbing themselves in the chest (hint: your heart is right between your left nipple and your breastbone). Those are the acts of desperate, attention-seeking people with no self-respect. :mad2: