Shawna Grove, 35, a mother of five from Billings who also used the name Shawna Hart, was found dead inside a vehicle on a rural Big Horn County farm after she was reported missing on April 24, 2026. Friends last saw her on the night of April 23 getting into a Chevrolet Traverse with her estranged husband, 32-year-old Tanner Michael Grove. An autopsy found a penetrating wound to the head was the cause of death.

Tanner Grove, who had a prior assault-related jail stay and was subject to a no-contact order at the time, was arrested on April 24 on outstanding warrants and later charged with deliberate homicide, burglary, and tampering with evidence. Bail was set at $3 million and not guilty pleas were entered on his behalf during the initial appearance. The case has prompted public outcry in Billings and led the city council to schedule a special session to review domestic violence response and protections.

Did anyone in the Billings area have contact with Shawna in the days before April 23 or see the Chevrolet Traverse that night?