HUDSON, Wis. -

Police who discovered the bodies of three Wisconsin sisters have testified at the insanity trial of the girls' father.

The officers arrived at the River Falls home of Aaron Schaffhausen's ex-wife on July 10, 2012.

Police officer Christopher Kober told jurors Thursday that he saw a pool of blood on the floor.The officers found the girls -- 11-year-old Amara, 8-year-old Sophie and 5-year-old Cecilia -- dead in their beds.

WCCO-TV reported that a compliance officer at a Twin Cities credit union testified Schaffhausen withdrew $1,000 from his account the day before the killings.

Schaffhausen had $800 cash on him when he turned himself in. The prosecution contends he may have considered fleeing after the killings.

Schaffhausen has admitted killing his daughters, but the defense contends he was legally insane.