This is the third fire since the bodies of a man and a woman were found. Police say a van parked in the backyard went up in flames at about 3 a.m. on Monday.
Meanwhile the suspect in the murders, Brent Zubek, is due in court Monday afternoon.
He's set to be arraigned on charges stemming from a shootout with police when he was taken into custody.
No murder charges have been filed.