BELFAST, Maine — Julio Carrillo pleaded guilty on Monday to depraved indifference murder for the beating death of his 10-year-old stepdaughter, Marissa Kennedy. Carrillo, 52, entered his plea during a hearing Monday afternoon at the Waldo Judicial Center in Belfast. He had been scheduled to go on trial next month. A sentencing hearing for Carrillo was scheduled for 9 a.m.