Detectives are picking their way through the rural property in Washington State where six people were killed Christmas Eve.
Prosecutors meanwhile are preparing charges against two suspects said to be the property owners' daughter and her boyfriend.
The victims were reportedly three generations of the same family, including two children.
Authorities say investigators have not found a weapon.
The only hint of a motive they've disclosed is a long-standing dispute between the woman and her parents.
"It was just money. She had a different way of thinking. My grandparents had a lot of money," said Ben Anderson, the
victim's family member.
Two deputies arrived at the property after a 911 call, but found a locked gate and did not go onto the property.