Martorano said he flew to Oklahoma, picked up a suitcase with machine guns, revolvers and masks that had been shipped from Boston via Greyhound bus, and shot Wheeler between the eyes. Callahan was so grateful he paid his friend $50,000.
But when trusted FBI contact John Connolly indicated that Callahan was going to be pressured by the government to testify about the murder, the Winter Hill partners, with Martorano outvoted, decided it was too risky for Callahan to live.
"I felt lousy but these were my partners. We were up to our necks in murders already," Martorano testified.
He said he arranged to meet Callahan in Florida, picking him up at the airport and helping him with his bags. Then as Callahan got into the front seat, Martorano got in behind and shot his friend in the head.
"I felt really bad. I'd just killed a man I'd risked my life for in Oklahoma," he testified.
Asked by the prosecutor whether he regretted his life of crime, Martorano responded, "Who wouldn't?"
During Martorano's testimony, Bulger sat ramrod straight and kept his eyes focused ahead, barely moving. Bulger turned his head, seeming to look at his former friend sitting just six feet away, only when Martorano said he learned Bulger was an FBI informant.