Could it be that even if the Giancana and Roselli hits were government hits, they were still killed by fellow mobsters? I believe Giancana was killed because bosses like Accardo felt like he was too high-profile. I can imagine he brought a lot of grief. And wasn't Colombo's shooter gunned down by a Colombo soldier/associate? How do you explain that one if the government whacked Colombo and Colombo's shooter?