COUNCIL BLUFFS, Iowa (AP) – A man accused of killing his mother and grandmother says he didn’t do it. The Daily Nonpareil reports that 30-year-old Michael Dieckmann denied the two first-degree murder charges Thursday in a Pottawattamie County court hearing. Dieckmann is being held on $1 million bond. He is accused of killing his mother, 63-year-old Jacqueline Dieckmann, and grandmother, 91-year-old Illa Pfeiffer, Wednesday morning at the trio’s Council Bluffs home.

Police say another daughter of Pfeiffer’s found the bodies around 10 a.m. Wednesday. Police say one of the women was stabbed, but the cause of the other’s death awaits more investigation. Some of Dieckmann’s family members say he is mentally ill.