WHO KILLED WALL STREET TYCOON TED AMMON IN HIS EAST HAMPTON, LONG ISLAND MANSION? -- "48 HOURS MYSTERY," SATURDAY, FEB. 5

Wall Street tycoon Ted Ammon, who was embroiled in a bitter divorce with his wife, Generosa, was murdered at their sprawling East Hampton, Long Island estate in October 2001. Correspondent Richard Schlesinger has an extensive interview with Danny Pelosi -- the home contractor who had an affair with Generosa, married her shortly after Ammon's death and became a prime suspect in the murder. Schlesinger also speaks to Pelosi's sister, Barbara Lukert, prosecutor Janet Albertson and Generosa's cousin, Al Legaye, for the 48 HOURS MYSTERY: "Murder in the Hamptons," to be broadcast Saturday, Feb. 5 (10:00-11:00 PM, ET/PT) on the CBS Television Network.

In the early 1980s, sparks flew between Ammon, a self-made millionaire, and Generosa Rand, an artist and real estate broker in New York City. They married in 1986 and adopted twins in 1992. But the marriage unraveled, and by the summer of 2000 they were living apart. Generosa had filed for divorce.

It was while renovating her Manhattan townhouse that Generosa met -- and fell in love with -- her contractor, Danny Pelosi. He was a high school dropout and a former alcohol abuser with a criminal record including drunk driving charges. Pelosi says of their relationship, "It was the princess and the pauper�.[Generosa] came from a world of enormous wealth. [She's] been to every continent and I've been to Florida, you know?"

Then, just before the Ammons' divorce became final, Ted Ammon was found bludgeoned to death in the East Hampton mansion. Generosa and Pelosi both became suspects. The affair was one thing, but Pelosi had also hired someone to install a surveillance system at the Ammons' estate so he and Generosa could spy on Ted from a laptop computer. Within days of the murder -- and before police arrived -- the hard drive from that surveillance system mysteriously disappeared.

Already under suspicion, Pelosi and Generosa married three months later. But just months after that, Generosa was diagnosed with terminal breast cancer, and she died in the summer of 2003. Danny Pelosi became the leading suspect in Ted Ammon's murder.

In March 2004, Pelosi was arrested to stand trial for Ammon's murder. But with no physical evidence, could prosecutor Janet Albertson convince a jury that Pelosi committed the crime? Was he set up by a scorned Generosa Ammon? Pelosi is known to speak his mind, and what he tells the court -- against his own lawyer's advice -- is surprising.

48 HOURS MYSTERY: "Murder in the Hamptons" is produced by Loen Kelley. The editors are Tom Costantino, David Spungen, Frank Hodnett and Grayce Arlotta-Berner. Katie Boyle is the senior producer and Susan Zirinsky is the executive producer.