With the cabin cruiser that capsized on July 4 finally out of the water and in the hands of Nassau police, investigators are examining the 34-foot boat for clues to what led to the tragedy that ended with three children dead.

The Kandi Won, raised Wednesday by Nassau police and the FBI, was trucked overnight to the marine bureau in East Rockaway. There, investigators began checking it for structural damage or mechanical failures that might have contributed to the capsizing.

They will also try to determine the number of life jackets aboard and whether the boat carried too many people to be safe.

The boat capsized at 10 p.m. on July Fourth, spilling 24 of the 27 people on board into the water. The three who died -- cousins David Aureliano, 12, of Kings Park, and Harlie Treanor, 11, of Huntington Station, and family friend Victoria Gaines, 7, of Huntington -- were trapped in the boat's cabin, officials said.

The Silverton Convertible was returning from a fireworks display when, the boat's driver said, it was hit by the wake of another passing vessel, tipped over and sank. It was recovered from 60 feet of water during a daylong effort complicated by silt that dropped divers' visibility to virtually zero, swift currents, and underwater movement from wakes.

The first pair of divers entered the water at about 9:50 a.m. Wednesday. By 4:25 p.m., the craft floated at a near-normal level and was towed by a Nassau County police patrol boat toward the Oyster Bay Marine Center.

advertisement | advertise on newsday

There, it was lifted out of the water with a special crane and put on a truck headed for the police marine bureau.

With Patricia Kitchen

and Gary Dymski