I know a lot of PR fans are gonna support him and claim that it was self defense for the murder of his roommate. But we don't know for sure, its too early to call and not enough information. The given context that we have right now does seems to be leaning towards that. Richardo didn't run away from the scene of the crime like most killers and actually surrendered himself to the police. So that sorta acts a leverage towards self defense. I'm not too good with US laws, but if he did use the sword on his roommate and he didn't have a gun or another sword on him, he might be in some serious trouble like major jail time for manslaughter. I think he definitely could of handled it differently, assuming that his roommate was just going crazy and wanting to assault him without a weapon. No reason to draw the sword there. I thought Ricardo also knew martial arts as well, so couldn't he kick his ass with his fists?