> I claim that Afroman is a criminal.

At 1:44 his own video (https://www.youtube.com/watch?v=oponIfu5L3Y) says "well, I know why narcotics" regarding the warrant. So I think he'd be OK with that statement of opinion.

If that was defamation, warrants like the one in this case are defamatory, having asserted he kidnapped someone.