Pitera stood trial for seven murders and two murder conspiracies: Richard Leone, Salomon Stren, Talal Siksik, Phyllis Burdi, Marek Kucharsky, Joseph Balzano, Wilfred Johnson and Andrew Jakakas. (I don´t know who the ninth victim was...Reiter?) He was found guilty in the Leone and Stern murders (in addition to racketeering, drug trafficking, and various firearms violations). But I´m not sure exactly if he was found guilty of murdering the other seven.

EDIT - Yeah, he was found guilty of six murders.