A domestic disturbance in Sandy, Oregon, on the evening of May 31, 2026, escalated into a mass fatality that left three people dead. Seventy-year-old Mary Beth Overson was killed inside an apartment in the 39500 block of Evans Street; her daughter, 37-year-old Jenna Mary Overson, and a 16-year-old neighbor, Kobyn McClure, also died. The suspected shooter was identified as 38-year-old Bryan Andrew Moore, Jenna’s husband and Mary Beth’s son-in-law.

Responding officers encountered an active shooter who reportedly barricaded himself and fired multiple shots, seriously injuring Sandy Police Sergeant Garrett Thornton. The standoff involved use of human shields, required a shelter-in-place for nearby residents, and ended just before 8 p.m. when Moore surrendered. He was arrested and charged with three counts of first-degree murder, attempted aggravated murder, felon in possession of a firearm, two counts of first-degree kidnapping and, per a later indictment, additional counts bringing the total to 17, including six counts of attempted aggravated murder and unlawful possession of methamphetamine. He pleaded not guilty and is being held without bail at the Clackamas County Jail while the Clackamas Interagency Major Crimes Team investigates.

Does anyone have information about Mary Beth Overson, her family, or the events that evening that could help investigators or provide context for the victims?