20-Time Killer: Bulger 'Broke My Heart' By Informing To FBI

Mug shots of James "Whitey" Bulger from 1953 and 2011.

"Well, sort of joking about it," Martorano said.

The gang later found Notorangeli hiding in Florida and shot him. Gang members also shot his brother, known as Indian Joe, to avoid later problems, Martorano said.

Martorano also testified about payments the gang made to law enforcement officers, including former FBI agent John Connolly, for information that that they used to avoid arrest. Connolly is serving a 40-year sentence in Florida, where he was convicted in 2008 of providing Bulger and Flemmi with information the gang used to kill other FBI informants.

Martorano was one of the chief witnesses against Connolly.

Connolly was taking money from gang members — Martorano testified Monday he gave Connolly a 2-carat diamond — and at the same time Connolly listed Bulger and Flemmi as top informants in the FBI's war on the Mafia.

The indictment against Bulger says his status as an FBI informant helped him avoid arrest for decades. He also is accused of involvement in 19 murders, extortion, drug dealing, money laundering and weapons offenses.

Bulger's lawyers have said they will attack Martorano's veracity when they question him, perhaps as soon as Tuesday. The defense lawyers have said Martorano is saying what he thinks prosecutors wants in return for an extraordinarily lenient sentence for 20 murders.

Martorano served 12 years in prison under a plea bargain with prosecutors. Prosecutors said Martorano is a critical witness against Bulger and the plea deal was the only way they could guarantee his testimony.

The years since Martorano's arrest in 1995 have been profitable in other ways too.

He said he sold the rights to his life to a movie production company for $250,000 and hopes to make more if a movie is made. He said he made about $75,000 on the book "Hitman" by a Boston Herald columnist. Martorano denied being a hit man, because he testified he never took a fee for killing anyone. He said agreed to the title because the author liked it.

"He thought it would sell better," Martorano testified.