Summer Rust was in pajama bottoms and a T-shirt and her four children also were in sleeping clothes when they were strangled in January in their El Reno apartment, according to autopsy reports completed this week.
All died from "ligature strangulation,” meaning they were strangled with something that left marks on their necks.
Police in March reported that they found a knotted red cloth, a white shoelace and other items when they searched the apartment for a weapon.
The oldest child, Kirsten Rust, 7, also had injuries near and in her genital and anal areas, Dr. Marius Tarau reported. Lacerations, tearing and bleeding were noted.
The doctor did not give any possible explanation in the report for those injuries, and a prosecutor said Friday he could not comment on the findings.
The mother’s boyfriend, ex-convict Joshua Steven Durcho, 26, is charged with five counts of first-degree murder.
He is accused of strangling Rust, 25, her daughters, Kirsten, Autumn Rust, 7, and Evynn Garas, 3, and her son, Teagin Rust, 4.
The mother was found in her bed covered with the bedspread. She was wearing "PJ pants, underwear and a dark blue ‘Bass Pro’ T-shirt,” the records show. The T-shirt was bloody.
Her tattoos included the name "Josh” on her right ankle, the records show.
The children’s bodies were in a bathtub partially filled with water. The girls were in T-shirts and underwear. The boy wore burgundy sweat pants.