Suspect Stephen Bratton once supported a bill that would have criminalized abortion in the state.
After being forced into a closet, an 11-year-old grabbed a machete and swung it at the intruder, striking him in the head.
Kenneth French "has never been violent with any of us, so we don’t know how this escalated," his relative said.
Autopsies were pending for an Iowa Department of Public Safety worker, his wife and their two sons. Police said all had been shot.
Karissa Fretwell and son William were last seen May 13, and the boy's father, Michael Wolfe, was indicted last week for murder and kidnapping in the case.