Alfa, didn't Pistone also say this in his book?

On the orders of his own capo, Dominick (Sonny Black) Napolitano, Pistone headed out to find Indelicato - with a .25-caliber automatic.

It turned out the caller had bum information, but the former lawman admits he would have pulled the trigger on Indelicato before jeopardizing his life or the operation. "If Bruno's there, he's gone," Pistone writes.

"If I have to put a bullet in his head, I will, and I'll deal with the federal government and the Staten Island DA later. ... There's no doubt they both would charge me for murder. The Bureau would brand me a rogue agent and hang me out."

During his six years infiltrating Sonny Black's vicious crew, Pistone dug up enough evidence to put away nearly 200 mobsters, all while making life-or-death decisions on how far to take his role-playing.

http://www.thechicagosyndicate.com/2007/01/joe-pistone-confesses-to-crimes-as-mob.html