Other mistake: In the scene where Jimmy and Henry try to strangle Maury with the telephone cord, the handset is off the hook, but the telephone still somehow rings.
Other mistake: When we see the shot couple in the pink car, there's blood spatter inside the windows and windshield, so that means the windows were up when they were shot, and they were shot in the car. It makes no sense that neither the windshield nor the windows are broken. If Jimmy shot them from the front, he would've had to have shot them through the windshield. If he shot them from the side, he would've had to have shot them through the window.
MikeH
Answer: Tommy was the only one who actively participated in Billy Batts' murder, so although Henry and Jimmy were accessories to the murder, they were probably overlooked given Tommy's reputation and because Tommy was "above" them within the hierarchy of their family. It's also implied within Henry's voiceover that Tommy was basically handed over by his family to Batts' family because Batts was a made man, ie. untouchable, and Tommy was not "made" to avoid further violence between the families and possible full-blown gang war; Jimmy and Henry's involvement was either unknown to or overlooked by Batts' people.
zendaddy621