Police in Brooklyn say the boyfriend of an MTA conductor who was fatally shot while walking home earlier this week will be charged with murder once he is captured.

Authorities are searching for 43-year-old Zire King.

They believe he shot 41-year-old Jacqueline Dicks on Monday night.

Dicks was shot in the head in East New York.

Police say they found surveillance video of King and Dicks talking before the shooting.

King initially told police that he saw a group of men walk up to his girlfriend, but investigators say the evidence points back to King.

"We went back and got video, very prominent video from that area where he was. There were no three males running in the streets with hoods up, there was none of that," said NYPD Chief of Detectives Robert Boyce. "We have them engaging in conversation. We also have him going back to his car directly after. We did a search warrant on that car and we found a .40-caliber handgun in the trunk of the car. We believe that to be the murder weapon.

Investigators say King and Dicks lived together with a 4-month-old child.

They believe the shooting was a domestic incident.