I believe Rich “may” have given info to wilileaks that looked bad but wasn’t enough to get someone sent to prison.
So he was delivering proof of some REAL crimes to someone who could prosecute. Namely the FBI or someone he believed to be FBI. He contacted them and told them what he had. They said “Sure, we’ll help you. Meet us at 4 AM and have the evidence with you. And make sure you don’t leave anything anyone else can get.”. Then he was killed.
The evidence wouldn’t seem to suggest it.
That night he had gone from one bar to another, then had two cell phone conversations with his girlfried, the last long one being audibly interrupted by what may have been his assassins just short of his residence.