it is not a matter of taking an oath at the point of testimony, the question was who was most truthful, a ton of crimes are solved with guys who flip, gravano unloaded the truth he just minimized his role and blamed gotti, but he put the shooters there. opened up all the union stuff.. joe messing the same..al darco slanted everything away from him and protected his son..but the guy solved so many homicides, no question..scars was also devastating. i just looked up how many times these guys put their hands up ..gravano 9 darco 9 scars 15! believe that ..that means these guys could not be proven to lie on the stand or they never would have been used case after case..throw vitali in , he was devastating also..he has i think 6 trials..so breaking the oath aside these guys stood the test of very good lawyers.rats all folks!