Authorities say Pantaleon fatally stabbed his girlfriend in her apartment sometime Sunday evening. He allegedly arrived at her mother's house around 6:30 a.m. Monday and struck the woman in the head with a gun.
The mother was treated at the hospital for a cut to the head.
Authorities say Pantaleon has a shaved head, has several tattoos, stands about 5-foot-4 and weighs 160 pounds. He may be armed with a knife and a gun.