the bonanno case the one which took down massimo and vitale all of them orginally started as an IRS investigation by the feds targeting Barry Weinberg and Augustino Scozzari both flipped wore a wire on richie cantella and frank coppa both flipped and then massimo and vitale got indicted then vitale flipped

so you could say the IRS investigation into barry Weinberg took down the entire Bonanno family hierarchy