This undated booking photo provided by the Chickasaw County Sheriff's Office in New Hampton, Iowa, shows Cheyanne Harris. Authorities have charged Harris and Zachary Koehn with murder in the death of their 4-month-old son, whose maggot-infested body was found in a baby swing in the family's home. (Chickasaw County Sheriff's Office via AP)

This undated booking photo provided by the Chickasaw County Sheriff's Office in New Hampton, Iowa, shows Cheyanne Harris. Authorities have charged Harris and Zachary Koehn with murder in the death of their 4-month-old son, whose maggot-infested body was found in a baby swing in the family's home. (Chickasaw County Sheriff's Office via AP)

ALTA VISTA, Iowa (AP) — Authorities have charged an Iowa couple with murder in the death of their 4-month-old son, whose maggot-infested body was found in a baby swing in the family’s home.

Twenty-year-old Cheyanne Harris and 28-year-old Zachary Koehn (kayn) were arrested Wednesday on charges of child endangerment and first-degree murder in the death of their son, Sterling Koehn. Court records don’t list attorneys for either of them. Their preliminary hearing is scheduled for Nov. 2.

Authorities say in court records that deputies and medics called to the couple’s Alta Vista apartment on Aug. 30 found Sterling dead in the swing. A medical examiner found maggots in his clothing and skin that indicated he hadn’t had a diaper change, bath or been removed from the seat in over a week.

Alta Vista is about 125 miles (200 kilometers) northeast of Des Moines.