NEW ORLEANS — Robert Durst, a wealthy heir to a New York real estate fortune, has been arrested in New Orleans on a warrant from Los Angeles, where his girlfriend's killing 15 years ago has been pursued by a cold-case squad. Durst is the subject of a six-part HBO series detailing his life of wealth and privilege as well as suspected links to the disappearance of his wife in New York and the killings of his neighbor in Texas and girlfriend in Los Angeles. The 71-year-old admitted killing the neighbor a decade ago, but denied involvement in his wife's disappearance or his girlfriend's murder. He was arrested in New Orleans on Saturday, as HBO was preparing to broadcast Sunday's first episode of a six-part documentary, The Jinx: The Life and Deaths of Robert Durst, by filmmaker Andrew Jarecki. Jarecki told The Associated Press that Durst, who has remained free despite suspicions of his involvement in three murders, is a strange but smart man who's long feuded with his wealthy family. "The story is so operatic," Jarecki said. "That's what's so fascinating to me — seeing someone who is born to such privilege and years later is living in a $300-a-month rooming house in Galveston, Texas, disguised as a mute woman." Durst, 71, has never been charged in connection with the 1982 disappearance of his wife, Kathie, or in the unsolved 2000 murder of Susan Berman, in Beverly Hills, California. He was acquitted in the 2001 dismemberment death of his Galveston neighbor, Morris Black, because he said the killing was in self-defense. Jarecki told a Hollywood version of Durst's story in the 2010 film that starred Ryan Gosling, All Good Things. A week before the release of that film, Durst called Jarecki saying he wanted to see it, and eventually agreed to be interviewed by Jarecki. That footage led to the documentary series. Jarecki said the six episodes left him with a "firm conclusion" about Durst's guilt or innocence. HBO distributed the first two episodes in advance, making news with Durst's admission that he lied to investigators about what he did on the night of his wife's disappearance. Jarecki has kept the last four episodes under wraps to maintain suspense.