Police continued searching early Monday for the man they believed killed his ex-girlfriend's new boyfriend late Sunday outside a home in south Dallas.
Cristobal Carrillo Jaimes, 18, is suspected of firing a semiautomatic rifle into a car parked outside a home in the 2900 block of Michigan Avenue, said Senior Cpl. Kevin Janse, a Dallas police spokesman.
Sitting in the car were the suspect's ex-girlfriend and her new boyfriend, 20-year-old Manuel Martinez, who lived at the address, police said.
The girl, whose name and age were unavailable, is pregnant with the suspect's child, Janse said.
"They were no longer dating," Janse said. "She had a new boyfriend who happened to be sitting in (the) car.
"Jealousy or whatever caused (the suspect) to pull a weapon and he opened up on the car."
Martinez was fatally struck in the back of the head, Janse said. The parked car, he added, went into reverse and struck a tree stump, but the ex-girlfriend was not hurt.
Patrol officers were called to the scene at 10:36 p.m. They subsequently got a tip that the suspect drove to his family's home in the 900 block of Brookmere Drive, which is about a mile and a half south of where the shooting happened.
Dallas SWAT was summoned, and a command post was set up at about 2 a.m. near the home on Brookmere, Janse said.
"He left the keys and the car there," Janse said. "That's why we thought he was in the residence. We called the family out of the house, and they said he left.
"SWAT was called in to confirm he was not in the house."
That confirmation was around 6 a.m., Janse said.
"The murder suspect was not located," Janse said. "Detectives are interviewing family members to try to determine where he may be."