Its hard to prove he had them killed. This does point out his intention to, but no one knows if the assasins actually did their job or simply lied to him.
He didn't. He attempted to have people assassinated but it was a sting operation and the images of the hits were faked.
yes, this.
You are pretty much guaranteed of being blackmailed or set up if you try to hire contract killers. This aint the movies.
also, this contract killing stuff makes the fed's case look like bullshit.
and FYI, Hell's Angels arent cool. They are the most conservative, narrow minded group of low level bullies around. Most of them don't even like motorcycles.