If Roth was sly enough to coordinate a whack job so fine-tuned that it would 1) involve whacking Pentangeli 2) have a cop interrupt the job 3) make Pentangeli think that the whole job was Mike's idea 4) Scare Pentangeli into thinking running to the FBI.....I would say that Roth is smarter than Vito himself!! Turnbull can elaborate on this scene for us, I'm sure. haha