A man and his mother have been arrested in connection with a death investigation. The man, 36 years old, faces charges of aggravated assault and unlawful restraint. His mother was arrested on a drug-related charge.

The investigation began after a woman died following a medical emergency. She was 31 years old and had three children. Authorities were called to the Onalaska area to respond to the emergency.

Further details about the investigation and arrests are available from the Polk County Sheriff's Office. The case is related to a suspicious death that occurred in May.