I would say just feel him out when he calls you. If he is trying to call his family for bail or trying to make multiple connections with one phone call that's one thing. However, if he asks you to call someone else then order a hit on them or something that could go very very wrong for you. Although the federales would have a hard time proving you were complicit in the act, it's not worth bringing yourself under any scrutiny either. If the call to whoever starts to go bad I would just hang up.
edit - can I have my banner now please?