The gunman who opened fire in an East Garden City office shot himself later in an apparent suicide, Nassau police said Tuesday.
Sang Ho Kim, 63, of Queens, suspected of killing a worker at Savenergy Inc. and seriously wounding the business' owner last week, was found dead Monday, floating in the Hudson River near the Bear Mountain Bridge.
Kim had shot himself in the mouth, but he also drowned and had heart disease, Insp. Kenneth Lack, a Nassau police spokesman, said, citing the Rockland County medical examiner's report.
"Those were all contributing factors in his death," Lack said.
Police said Kim, a vendor for Savenergy Inc., an energy-efficient lighting company, walked into its offices last Wednesday morning and fatally shot employee Zachariah Yong Jae Shin, 25, of Whitestone, Queens, and seriously wounded the owner, John Hyung Choi, of Woodmere.
Police have not given a motive for the shooting, but a law enforcement source and Kim's relatives said he believed he had been cheated out of money by Savenergy.
The night of the shooting, Kim's sport utility vehicle was found at Little Stony Point, a park on the Hudson about 60 miles north of Manhattan.
Kim's body appeared to have been in the water for several days. It was identified through fingerprints, police said.
Choi was in stable condition Tuesday at a hospital in the North Shore-LIJ system, a hospital spokesman said.