Victor Talavera and his family believe they know who killed his son, 33-year-old Nick Carrillo, on the night of Feb. 3.
It was a man who grew up in the same north-side neighborhood as Carrillo, Talavera said. Now he's worried that man is trying to cross the U.S.-Mexico border to flee authorities.
Fort Worth police obtained an arrest warrant for Jesus Duran a day after Carrillo's slaying, said homicide Sgt. Joe Loughman.
Talavera, 61, and his wife are in the process of adopting two of Carrillo's three daughters in the aftermath of the shooting, which occurred at the house Carrillo shared with his girlfriend in the 4300 block of Martha Lane.
Those two daughters and six other children, two of whom were fathered by Duran, were in the home and witnessed the shooting, Talavera said.
Duran "was shooting in a room where his own kids were sitting," Talavera said. "All we want right now is for him to be caught, for justice to take place."
A disagreement over the children led to the shooting, Talavera said. Carrillo's girlfriend apparently had two children from a previous marriage to Duran, and Duran had come to visit them.
Around 10 p.m., Carrillo told Duran, 35, that it was late and he needed to leave.
"That's where it erupted," Talavera said. "Nick wanted to get the kids to bed."
Carrillo was pronounced dead at 10:24 p.m.., according to Tarrant County medical examiner's records. The official manner of death is listed as homicide, caused by gunshot wounds of the chest.
Duran was indicted last March on federal drug-trafficking charges, according to court documents. The documents also show that he had previously "showed up to his wife's residence at approximately 3:00 a.m." last July 4, "and threatened to kill himself."
Carrillo was sentenced to seven years in prison in 2002 for aggravated assault with a deadly weapon.
For Talavera and his wife, Esther, the days are now filled with tending to their granddaughters, ages 3 and 5, getting back in the swing of parenting and receiving help from professional counselors as the family adjusts to life without Carrillo.
"Our family needs to heal," Talavera said. "We've got to start the process of healing."
The Talavera family, and Fort Worth police, encourage anyone who knows Duran's whereabouts to contact the homicide unit at 817-392-4330.
Staff writer Deanna Boyd contributed to this report.