Two more Somali men pleaded guilty on Monday to piracy for their roles in the hijacking of a yacht that left four Americans dead, including one who identified which of the 19 men fired at hostages aboard the boat.

Burhan Abdirahman Yusuf and Jilani Abdiali face mandatory life sentences, but as part of a plea agreement they could serve less time than that and eventually be deported to Somalia.

The duo are among 14 people from Somalia and one from Yemen facing charges related to the February hijacking of the yacht Quest. Three of those men have already pleaded guilty to piracy in plea deals.

The owners of the Quest, Jean and Scott Adam of Marina del Rey, Calif., along with friends Bob Riggle and Phyllis Macay of Seattle, were shot to death several days after being taken hostage several hundred miles south of Oman.

They were the first U.S. citizens killed in a wave of pirate attacks that have plagued the Gulf of Aden and the Indian Ocean in recent years. Prosecutors said the men intended to bring the Americans to Somalia and hold them for ransom there. Pirates typically seek millions of dollars for hostages.

In a statement of facts Yusuf agreed to Monday, Yusuf said the 19 men who had taken control of the yacht would have split 65 percent of the ransom money among themselves and an interpreter. The other 35 percent would be given to a financier. In Abdiali's statement of facts, he said he saw that pirates were making a lot of money and had big houses and cars, so he spoke with a financier about joining a pirate expedition that ultimately led him to board the American yacht.

Former International Monetary Fund chief Dominique Strauss-Kahn has shed little public light on his account of what happened between him and a hotel housekeeper who accused him of sexually attacking her. But in a potentially revealing hint, one of his lawyers has said he doesn't expect the evidence will show a forcible encounter.

If Strauss-Kahn's lawyers are planning to argue there was a consensual liaison, they would be using a common sex-crime defense argument — but one that has both succeeded and failed in other high-profile cases. It sets up a "he-said, she-said" confrontation that can pose challenges for defense lawyers and prosecutors alike, legal experts say.

"They're really difficult cases because, by their very nature, nobody else is there," said Brenda Smith, an American University Washington College of Law professor who has studied sexual violence. Even DNA or other forensic evidence might establish sexual contact but still not prove an attack, "so it really is the credibility of the complainant and the defendant, and also the facts and information that each side can marshal to support their version of what occurred."

For now, Strauss-Kahn is under house arrest in a Manhattan apartment on a total of $6 million in bond and cash bail, facing attempted rape and other charges. At the time of his May 14 arrest, the 62-year-old economist and diplomat led the powerful, loan-making IMF and was considered a leading contender to challenge French President Nicolas Sarkozy.

Prosecutors say he chased down the cleaner in a penthouse suite, groped her, tried to pull down her pantyhose and forced her to perform oral sex.