Robert and Barbara Curley embrace at the State House in 1997 following a House vote on capital punishment. (Globe Staff Photo / Jim Davis)

Barbara and Robert Curley allege that NAMBLA "encourages its members to rape male children."

The suit filed in U.S. District Court also claims that "NAMBLA serves as a conduit for an underground network of pedophiles in the United States."

Jeffrey Curley was killed on Oct. 1, 1997. Salvatore Sicari, of Cambridge, was convicted of first-degree murder in the case, while Charles Jaynes, of Brockton and Manchester, N.H., was convicted of second-degree murder and kidnapping.

Prosecutors said the two young men were sexually obsessed with the boy, lured him from his Cambridge neighborhood with the promise of a new bike, and then smothered him with a gasoline-soaked rag when he resisted their sexual advances.

The $200 million lawsuit, which also names the Internet service provider that allegedly carries NAMBLA's Web site, alleges that Jaynes joined NAMBLA in the fall of 1996, read the group's publication and Web site and "became obsessed with having sex with and raping young male children."

Immediately before participating in the murder, the lawsuit alleges, Jaynes accessed the NAMBLA Web site at a public library.

The message box at the North American Man/Boy Love Association telephone listing in New York City was full late Tuesday afternoon. The message said the organization "speaks out against societal repression and celebrates the joys of men and boys in love."

The lawsuit also names seven individuals who allegedly are the leaders of NAMBLA. Most of their addresses were unknown.

The address for one of the individuals was listed, but a woman who answered Roy Radow's phone in New York said he wasn't home and she wouldn't take a message.

The lawsuit also names an Internet provider, Verio Inc., of Englewood, Colo., saying it has violated its own policies by hosting the NAMBLA Web site and is providing an international communication system for pedophiles.

A company spokeswoman said the company hadn't reviewed the lawsuit and, until it did, it couldn't comment.

The 21-count lawsuit brings wrongful death and conscious suffering claims against NAMBLA, the seven individuals, Verio and a previous Internet service provider that was bought by Verio.

It also brings a civil rights violation claim against NAMBLA and the seven individuals.

Attorney Lawrence Frisoli said he didn't know of any previous civil lawsuits against NAMBLA.

Frisoli said Jaynes' connection to NAMBLA emerged partly from investigation for a previous lawsuit that was won by the estate against Jaynes and Sicari. A judge is expected to rule on damages in that case on July 5.

"Basically, the objective is to first basically bring them to justice, have the members of NAMBLA held accountable for their actions civilly," he said.

"I look forward to a jury in Massachusetts approximately one year from today returning a verdict of justice on behalf of the estate of Jeffrey Curley against all the defendants," he said.