FAIRFIELD, Calif. -- An intense manhunt came to a conclusion Thursday when a 19-year-old, who police say shot and killed his pregnant teenage girlfriend in her Fairfield home, was taken into custody.

Fairfield Police spokesman Al Bagos told KTVU that Antonio Williams' mother brought him to police headquarters where he surrendered without incident at 9 a.m.

"The mother lived down the street (from the home where the fatal shooting took place)," Bagos said. "She came to the home last night and we told her of Antonio's involvement...She brought him into the police station this morning."

The capture ended a manhunt that began shortly after the fatal shooting.

"The boyfriend left in a hurry (after the fatal shooting)," Bagos said. "Arriving officers quickly set up a perimeter, but the suspect could not be located."

Officers responded to an apartment in the 1200 block of Dana Drive at about 8 p.m. after receiving reports of a shooting.

Shearell Dillon, 19, was found suffering a single gunshot wound to her chest. She was transported to NorthBay Medical Center where she was pronounced dead at 11:09 p.m., according to authorities.

"The mother (Williams mother) said there was no indication of trouble," Bagos said. "They were fine and laughing and having dinner together just the other night."

Dillon was 16 weeks pregnant and lived at the apartment with her mother, two brothers and Williams, according to officers.

A preliminary investigation indicated Williams and the victim were in an upstairs bedroom in the apartment when witnesses reportedly heard a single gunshot ring out from that bedroom, according to officials.

Williams allegedly then walked out the front door, police said.

Anybody with information regarding this incident is urged to call the Fairfield Police Department at (707) 428-7314.