Hill and Vario were reported very close. While Hill was still imprisoned Vario had an affair with Hill’s wife, Karen. During this time they became very close. When Tommy DeSimone tried to rape Karen, Vario called the Gambino family and told them DeSimone was responsible for killing two of their men. The Gambino’s killed DeSimone in January 1979.
http://americanmafiahistory.com/paul-vario/
it will always be a [citation needed] issue since this was among the italians. it was real greaseball shit.