House got raided by the GBI due to roommate’s illegal activity

So I been living with my bf since August of last year. His roommate has been living with him for two years. The roommate is a quiet person. There has been issues with his cleanliness so he was an ok roommate. Well today the house got searched by the gbi(georgia beauro of investigation) due to the roommate’s illegal activity on the internet. It was really bad stuff. I do not want to go into detail because idk if the topic will be allowed and i don’t trigger anyone. My bf feels like this is his fault because he felt like he should have did more research but there is no criminal background on the roommate. The roommate was someone down on his luck and my bf was just trying to help him. I am still in shock and processing everything. It sucks being put in handcuffs and being treated like I done something bad but I understand why the officers did that. The whole ordeal feels unreal because you see this stuff on tv and never would think this would happen to you.