LOS ANGELES—The woman arrested on suspicion of killing her three young children at her Los Angeles apartment had been involved in a custody dispute with their father, according to a newspaper report Sunday. Liliana Carrillo, 30, was arrested Saturday in Tulare County after fleeing the gruesome scene and leading law enforcement officers on a long-distance chase, authorities said. The Los Angeles Times cites family court documents that show Erik Denton sought custody of the children—ages 3, 2 and 6 months—on March 1. Denton requested a temporary emergency visitation order from the court on March 4 and petitioned for a mental health evaluation of Carrillo, according to the newspaper. Orders were drawn up at a March 26 hearing. Another hearing in the case was scheduled for April 14. In response, Carrillo sought a temporary domestic violence restraining order against Denton on March 12 in Los Angeles County Superior Court, documents show. …