heres my guess on why he got killed. he was a big shot on the docks in Brooklyn long controlled by the gambinos. the Genovese take him out traying to weaking the power base of the gambinos. gotti who had nothing to do with it gets pissed at the john riggi maybe cause he did or did not give the westside the permission to clip guy. gotti says now all 40 of you guys report to me. at the time gotti was trying to get more power in new jersey. the westside had taken over the philly family, at the time bobby manna and all the jersey guys got caught on tape plotting to kill gotti and gene. what better way of making a power play for jersey than taken over there family. maybe that's why gotti wanted to kill corky so bad cause he was like a Genovese guy. but in the end Sammy the bull gave up all the murders of gotti and rotondo never came up I don't even think his kid knows the truth to this day.