Jury selection is now underway in the trial of Whitey Bulger, the legendary Boston mobster. In an indicator of how dangerous and notorious the case is, the jurors will be referred to by number only - never by name.

U.S. District Judge Denise Casper told press Monday that "given the circumstances," the jurors' names will not be made public until after a verdict is reached.

675 possible jurors are being narrowed into the jury panel and questioned.

While Bulger is a Boston legend, he's no longer a ruthless organized crime boss - he's an 83-year-old man whose crimes were committed decades ago. Bulger spent twelve years on the FBI Most Wanted list and 16 years on the run, hiding for most of them quietly in Santa Monica, California until a neighbor realized that the nice retired couple next door was the notorious Irish mobster and his wife, Catherine Greig.

Bulger is accused of 19 charges of murder, including, allegedly, the strangulation of Debra Davis in 1981 because she wanted to break up with his partner, Steven "The Rifleman" Flemmi. Flemmi is expected to testify.

Bulger will also face trial for extortion, racketeering, and weapons and money-laundering in a 33-count indictment.

Bulger is notorious not just because he was a crime boss, but because he apparently played a double game as an FBI informant for almost two decades - he fed the feds information on a rival Italian-American gang, not his own, and thus was able to both escape prosecution and advance his own cause.

Bulger's wife, Grieg, has already begun an eight-year stint in prison following a 2012 trial. The two were found and re-captured in 2011. They fled in 1994 after his FBI handler, John Connelly, tipped them off.

Legends from the era, including gangsters, reporters, and a string of people from the FBI and government, are expected to testify.

For the defense, FBI Director Robert Mueller, former Massachusetts governor William Weld and U.S. District Judge Richard Stearn will testify-Bulger says he had immunity from a federal prosecutor at the U.S Attourney's Office in Boston, where they all worked.

The prosecution will call on Bulger's partner Flemmi and other notorious gangsters including hitman John Martorano, who admits to 20 murders.

CBS News' John Miller, a former FBI deputy director, says the "legends of the Boston Mob" will indicate "a continuing criminal enterprise. They're going to prove that this was the machine that Whitey ran.

"He is one of those rare characters who is as much like the gangsters we know from the movies, but he operated that way in real life," Miller told press.