1. Attacked a Kage meeting, and killed many Samurai. Yes, it's in self defense, but he shouldn't of been there anyway, they we're doing right to fight Sasuke off.
2. Attacked a Kage rank Shinobi, even if he blew himself up and everything, he still attacked him. That's like shooting the president, but it misses, does that mean your not convicted of anything?
3. Joined Akatsuki. THIS IS A HUGE CRIME.
4. Attacked Cloud and attempted to sedate and kill the Bijuu of Cloud. Extracting means Bee would die.
This is most of them. I can't think of anymore at the moment, but I hope this helped.