I'm heartbroken after following this one closely. I had hoped this would not be the outcome, but suspected it would be.
Although I still think there's a good chance that he met with foul play after taking the money out in order to buy something/pay for a service of some kind, I don't think suicide is farfetched despite the ATM withdrawal. I think it's very possible he withdrew the money to give away, but didn't empty the whole account because some of the money was supplied by his parents. Maybe the $150 is what he saw as 'his' money, versus what they'd given him. He might have reasoned that the rest was not really his to give away.
Also, as someone who has struggled with suicide ideation since childhood ... I'd ask that anyone who has picked up the quip about 'permanent solution to a temporary problem' try to banish it from your vernacular. Although it's true that SOME people die by suicide as an immediate reaction to a circumstance, for many people who die that way, it is NOT a temporary problem. It's something they've been struggling with for years. As catchy as the phrase is, it implies shortsightedness or weakness when the truth is that the person might just have finally decided enough was enough after years of pushing through extreme distress with resilience few people will ever understand. If I ever don't outlast a dark episode, it will not be shortsightedness--because I know every time that it's NOT going to end. There are respites, but they are not permanent. It'll be that a terminal illness finally got me, just like someone might die of cancer after a long illness.
Everything I've read makes me think that Owen and I are very similar. Deeply sensitive and compassionate, introspective but also uninterested in burdening others with our problems. My parents had no clue I'd been struggling with suicide and self-harm since grade school until they got a call from me while I was away at college, age 20. I asked them to come get me because I wasn't okay. I called because I had a good friend like Owen's roommate--but he had the additional insight of a suicide attempt in his past, he saw troubling signs and told me I could call my parents or he would call them for me. If suicide was Owen's end, I'm only very sorry chance didn't happen to throw a barrier in his path long enough to slow him down so someone could help him.