ALTOONA, Pa. (November 16, 2012)--A little boy died after a man set fire to a family's Pennsylvania home thinking his ex-girlfriend was inside, police said.

Altoona, Pa., police say Aaron Wilson Dishong, 62, set the fire in an attempt to kill his ex-girlfriend, but only two young children and their mother were inside.

Daryl Etchison, Jr., 3, was killed in the fire.

Authorities say his mother jumped from a third-floor window to save herself and her 2-year-old daughter.

Dishong allegedly incriminated himself during a phone call with a witness that was monitored by police.

Investigators say he had been stalking his ex-girlfriend, who had a restraining order against him.

Dishong was jailed night on homicide, arson and related charges.

He denied setting the fire following his arraignment.

Etchison's mother remains hospitalized.