Even if he were exiled and cut off entirely from Michael, Connie even Tom would probably keep in touch and could inadvertently let slip and reveal something of value
... and what about Connie? She's a woman; she's emotional; she doesn't know the business. So, she's likely to to do something stupid thinking she's helping. Whack her too. And what about Tom? He's not even blood and he's Irish on top of that. Besides, mom always liked him best. Get rid of him.
