Suspect in Fatal Subway Push Is in Custody The victim, Ki-Suck Han, a married father who lived in Queens, tried on Monday to climb back onto the platform, but could not get out of the way of a southbound Q train arriving in the 49th Street station. He was pronounced dead at St. Luke's-Roosevelt Hospital, the police said. Police detectives found the suspect after reviewing video surveillance footage from subway stations and other cameras posted in the area, the Police Department's chief spokesman, Paul J. Browne, said. The investigators "saw his image at various locations and found people who knew him," Mr. Browne added. Police officials are in the process of gathering witnesses to the episode, which occurred at 12:30 p.m. on Monday, in order to conduct a lineup. Mr. Browne said the police would not "identify him until a lineup is done." Mr. Browne said he did not know where the suspect was found.