James "Whitey" Bulger, the reputed former head of Boston's Winter Hill Gang, evaded police for 16 years before being arrested with girlfriend Catherine Greig in Santa Monica, California, in 2011. Seen here in a 1984 FBI photo, he is facing trial for racketeering, extortion and 19 counts of murder. 
According to prosecutors, Bulger's crew learned that a bookie named Richard Castucci was cooperating with the government, and John Martorano was sent to kill him. Castucci was shot in the head and stuffed in a sleeping bag in the back of his car. 
Steve "The Rifleman" Flemmi, left, and bookie Dick O'Brien in one of several surveillance photographs entered into evidence in the Bulger trial. Flemmi, Bulger's partner, would meet O'Brien to collect thousands of dollars in "taxes" every month. 
Flemmi's stepdaughter, Deborah Hussey, was allegedly murdered in 1985 by Bulger because she knew that Flemmi was an FBI informant. 
Flemmi met Debra Davis at a jewelry store, and the couple dated for more than seven years. In 1981, Bulger is said to have killed Davis because she knew that Flemmi was an informant. 
Bulger is accused in the slaying of Roger Wheeler, a wealthy businessman who was gunned down outside a country club in Oklahoma in 1981. 
Bulger was the godfather to John Martorano's first son. Martorano has admitted to 20 killings as part of Boston's Winter Hill Gang and is the government's star witness against Bulger. 
Prosecutors said they found more than $800,000 in cash and 30 weapons, including handguns, an automatic rifle and a hand grenade, when Bulger was arrested in 2011. 
Photographs of weapons that officials said belonged to Bulger at the time of his arrest in 2011. 
Photographs introduced as evidence show weapons allegedly belonging to Bulger at the time of his arrest in 2011. 
In 2008, John Martorano testifies against former FBI agent John Connolly, who was accused of helping the Boston mob kill gambling executive John Callahan in 1982. 
Former FBI supervisor John Morris testified at Bulger's trial on Friday, June 28, saying that he provided information to Bulger in exchange for money and gifts. Here, Morris testifies during the John Connolly murder trial in Miami in 2008. 
Connolly was convicted of second-degree murder in the slaying of John Callahan and received a 40-year sentence in 2009. 
Bulger's booking photo from June 23, 2011. 
Bulger's girlfriend, Catherine Greig, was sentenced to eight years in federal prison in 2012 for identity fraud and helping the reputed mob boss avoid capture for 16 years. 
J.W. Carney, Bulger's defense attorney, arrives at the U.S. Federal Courthouse for the start of Bulger's trial in Boston on Wednesday, June 12. 
This undated surveillance photo released on Monday, July 8, by the U.S. Attorney's Office at federal court in Boston shows Bulger, left, with his former right-hand man, Kevin Weeks. Weeks took the witness stand at Bulger's racketeering trial and described a double slaying, multiple extortions and drug dealing. 
Bulger and Weeks walk around Castle Island on Boston Harbor. 
Weeks leaves the courthouse on July 8 after testifying in graphic detail about how Bulger killed Arthur "Bucky" Barrett, Joey McIntyre and Deborah Hussey. 
Mug shots of Bulger in 1953. 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
- Kevin Weeks, former partner of James "Whitey" Bulger, testifies against reputed mob boss
- Weeks' testimony under cross-examination triggers shouting match with Bulger
- U.S. marshals step in; judge orders men to behave themselves
- Bulger is charged in the deaths of 19 people over two decades
Editor's note: This article contains language some readers may find offensive.
(CNN) -- Two days of testimony by a former partner of reputed mob boss James "Whitey" Bulger ended dramatically Tuesday when Kevin Weeks and Bulger -- once so close that they spoke nearly every day for more than a decade -- shouted at one another across a federal courtroom in Boston.
Bulger's lawyer, J.W. Carney, tried to portray Weeks as an opportunist who knew how to manipulate the system, someone who cut a deal with prosecutors to serve just five years in prison for aiding and abetting five killings, several of which, Weeks testified, he saw Bulger commit.
"You won against the system," said Carney.
"What did I win? What did I win," Weeks said, his voice sounding strained and tired. "Five people are dead."
Asked whether that bothered him, Weeks shot back, "We killed people that were rats, and I had the two biggest rats right next to me ..."
At that, Bulger turned and hissed, "You suck."
"F--- you, OK," snapped Weeks.
"F--- you, too," shouted Bulger as the jury watched.
"What do you want to do?" said Weeks, his eyes locked on Bulger, who was flushed and staring right back.
Victim's widow testifies against Bulger 
UFC boss: I was shaken down by Bulger 
Bulger witness draws tears from jury U.S. marshals stood between the two men, and U.S. District Judge Denise Casper instructed them both to follow the rules of the court before Weeks was dismissed, his testimony over.
Bulger is charged in the deaths of 19 people during some two decades when prosecutors say he ran Boston's Irish mob. He also faces charges of extortion, racketeering and money laundering.
Why we can't get enough of the gangster life
Prosecutors spent most of the morning questioning Weeks about killings he said he saw Bulger commit.
Weeks recounted to the court graphic details of how Bulger killed Arthur "Bucky" Barrett, Joey McIntyre and Deborah Hussey.
In the summer of 1983, Weeks said Bulger organized a meeting with Barrett under the guise of having stolen diamonds that he needed to have taken off his hands.
When Barrett arrived at the house, Bulger, his crime partner Steve Flemmi and Weeks were waiting.
The group then chained Barrett to a chair and grilled him for hours about a rival gang and local drug dealings, Weeks said.
Barrett tried to buy his way out of being killed, describing to Bulger where he had hidden $40,000 in cash.
Weeks said Bulger left the house to pick up the cash while he and another associate watched Barrett.
When Bulger returned to the house, he instructed Barrett to walk down to the basement. Then Bulger put the gun to the back of Barrett's head, pulled the trigger, and according to Weeks, "nothing happened."
When Bulger realized that the gun's safety was still on, he removed it and shot Barrett.
Weeks said he also saw Bulger shoot McIntyre in the same house where he killed Barrett. His methods were the same, too -- he chained McIntyre to a chair, where he admitted to letting authorities capture a boat carrying 40 tons of marijuana slated for sale by Bulger and his gang.
"Jim Bulger took out a rope and started strangling McIntyre; it was too thick, it just gagged him and then Jim asked the victim, 'do you want one to the head?' " Weeks said.
McIntyre said, "Yes sir," and Bulger shot him five times.
Weeks said he also witnessed the killing of Deborah Hussey in that same home.
On a day in early 1985, Weeks said he came downstairs after hearing a "thud" and saw Bulger strangling Hussey, whose lips turned blue as her eyes rolled back into her head.
After each of the three slayings, Flemmi prepared the bodies to be buried by removing the victims' teeth. This practice earned him the nickname "Dr. Mengele," after the infamous Nazi physician, Weeks said.
The victims were buried in the basement of the house only to be moved to another makeshift grave because the owners of the house were selling it.
"It was cheaper to move the bodies than buy house," Weeks explained.
Most of the cross-examination focused on Weeks' decision to testify against his former crime partners, including Bulger, Steven Flemmi and rogue FBI agent John Connolly. Weeks acknowledged that Bulger hated informants, explaining South Boston's code as: "You never give up your friends. You never rat on your enemies. You take care of your own business."
At times Weeks seemed apologetic, saying he had hoped Bulger would never be caught "so he wouldn't be in the circus we're in."
After escaping a 1995 indictment, allegedly on a tip from a rogue FBI agent, Bulger went into hiding for 16 years, landing himself on the FBI's most wanted list before being arrested with his girlfriend in Santa Monica, California, in 2011.
However, Weeks defended his actions, saying he had been shown Bulger's informant file by fellow South Bostonian, or "Southie," and disgraced FBI agent John Connolly and that, "You can't rat on a rat." He says no one has given him any trouble since he returned to South Boston, not even the Italian mafia, which allegedly continues to operate.
In 'Whitey' Bulger's gang, death was way of life
When Bulger's lawyer suggested Weeks had lied at times, Weeks shot back almost in disbelief: "I've been lying my whole life. I'm a criminal." But he clarified that his lies were confined to smaller matters, not the testimony he has provided at nearly five trials.
Carney asked, "What lies do you tell your wife?"
"I'm not cheating," said Weeks by way of explanation.
"Does she know you're lying?" asked Carney.
"We're divorced," Weeks responded.
