If a CI killed him, and the Feds knew, they wouldnt charge anyone in the murder. They would play dumb. By bringing charges against anyone, they are increasing the attention to the case. So, if it were true that it was a CI and the feds knew, the feds would just continue to give the "its under investigation" until something else tragic happens and everyone forgets about it. And bail in any case involving murder, regardless of the role of the person (i.e., shooter, accomplice, eyewitness who may flee) is hardly ever granted; ESPECIALLY in mob cases, since witnesses DO disappear. Obviously!