Vent: husbands friend murdered

So last night one of my husbands friends was murdered. This is very unusual in our town - it's generally a quiet town, no violence and not much crime at all, so it's all the more shocking. He found out around 1am that he was shot multiple times in the head and torso at our local legion.  I fully understand being sad, upset, angry at whoever did this (there's rumors but nothing confirmed)... But unless he's with his friends, he's taking out his frustrations on me! He's also blaming himself because he called the friend an hour or so before it happened and asked him to come over, but his girlfriend had the car so he didn't have a ride, and my husband just let it go rather than offering a ride or trying to convince him to come over. I've been trying to support him as much as I can, reminding him that it's not his fault in any way, the guy wouldn't want him to keep bringing the pain up or feel guilty for feeling happiness... But someone I'm still the bad guy in the situation and being treated crappy because he's upset. Like I said, I understand being upset... But something like this should make you pull your family closer to you, not push them away. I ended up going to a friends house to get out of the stressful situation, but I worry that makes it worse and makes him feel more alone and like I'm not supporting him. I just needed to vent. It's a situation I never thought we'd be in, and certainly didn't think he'd react in the way he is as far as his behavior towards me goes.