Lubbock police arrested a 40-year-old man Wednesday night in connection with the shooting death of his 29-year-old girlfriend in South Lubbock, according to Lubbock police officials.

Jason Mercado was booked about 4 a.m. Thursday into the Lubbock County Detention Center on a murder charge, according to jail records.

Investigators with the Lubbock Metropolitan Special Crimes Unit believe Mercado shot and killed his girlfriend at a home in the 700 block of 79th Street, according to a Lubbock police news release.

Lubbock police officers and EMS responding to a 10:40 p.m. Wednesday shots fired call at a home in the 700 block of 79th Street found Kayla Quintero unresponsive. She was pronounced dead at the scene, the release states.

An initial investigation indicates a domestic dispute between the two took place before Mercado shot Quintero.

This case remains under investigation by the Metropolitan Special Crimes Unit.