Las Vegas ? A Panamanian accused of planting a bomb that killed his ex-girlfriend’s new romantic interest outside a Las Vegas Strip resort pleaded guilty Monday to having false identification.

A justice of the peace sentenced Omar Rueda-Denvers to 10 days in jail on the misdemeanor charge, ensuring that he would remain jailed pending an initial appearance today on murder and attempted murder charges. He could be sentenced to life in prison if convicted.

Willebaldo Dorantes Antonio, a 24-year-old worker at a hot dog stand inside the Luxor hotel-casino, died of head injuries last week about two hours after trying to pick up a small motion-activated bomb that had been left on his car, authorities said.

Police said Dorantes Antonio, of Mexico, was dating a co-worker from Guatemala who investigators said was the ex-girlfriend of Rueda-Denvers and mother of the Panamanian’s child. All three adults were illegal immigrants, authorities said.

Rueda-Denvers did not have a lawyer during Monday’s hearing. He spoke only to acknowledge through a Spanish-language translator that he understood the charge against him, and to plead guilty.