SPRINGFIELD, Ore. -

Police in Springfield, Ore., have identified a woman found fatally stabbed in a rental home and say her 23-year-old son has been arrested in California.

The Register-Guard reports that police say Sean Patrick Kelley has a history of mental illness. He was arrested at the same house on Oct. 7, accused of confronting his 59-year-old mother, Susan Jackson, while armed with a knife.

Police who began investigating Jackson's death Tuesday morning after a neighbor reported finding the body immediately began looking for Kelley. He was arrested Tuesday evening in Mendocino County, Calif.

Kelley was not charged in the alleged early October confrontation at his mother's house. Lane County Chief Deputy District Attorney Patty Perlow said Wednesday the evidence didn't support a criminal charge.