Police are now seeking the boyfriend of a subway conductor who was gunned down outside her home in East New York Monday night.

Jacqueline Dicks, a 41-year-old MTA conductor who lived on Elton Street, had almost completed her return home from work at the time of the shooting.

The boyfriend, 44-year-old Zire King, had initially given police descriptions of three men he said were responsible for Dicks' death. He told investigators that he picked her up from work and dropped her off just before the shooting. But now police say he is the main suspect.

King is 5 feet 9 inches tall and weighs around 170 pounds, according to authorities.

Police are asking anyone with information on the crime or King's whereabouts to contact Crime Stoppers at 1-800-577-TIPS.

The Transportation Workers Union, of which Dicks was a member, says it has "full confidence in the NYPD."

"We hope they catch him soon and put him in a jail cell where he belongs," the union statement went on to say.