EL PASO, Texas (AP) — A West Texas man must serve to life in prison for the 2015 fatal shooting of his ex-son-in-law over what prosecutors call a child custody dispute.

Javier Arellano Quiñones (keen-YOH'-nays) was sentenced Friday in El Paso. Jurors convicted the El Paso man of murder and of interfering with child custody — his granddaughter.

William Wolff was a community college professor when he slain in December 2015. He'd recently won custody of his then-2-year-old daughter.

Authorities in January 2016 arrested the girl's mother, Erika Wolff, and her parents as they left Mexico and entered San Ysidro, California, with the child.

Erika Wolff awaits trial on charges of aggravated kidnapping and interfering with child custody. Her mother is charged with interfering with child custody.

The youngster was placed with child protective services.