A young member of the Crow Tribe of Montana who is a suspect in a triple homicide on the reservation was arrested in Spokane, Washington, on Wednesday evening.

Sheldon Bernard Chase, 22, is suspected in the shootings of his grandmother, Gloria Sarah Goes Ahead Cummins; his 21-year-old cousin, Levon F. Driftwood; and her boyfriend, Rueben Charles Jefferson, 20. The incident occurred at Cummins' home near Lodge Grass.

Authorities aren't speculating on a motive. Chase has been described as a quiet person with a history of mental illness.

"It really is not at an ending point," FBI supervisor Eric Barnhart told The Billings Gazette of the arrest. "We've got a brutal homicide and we want to make sure he has his day in court. We want an airtight case.

Get the Story:
Man sought in Lodge Grass shooting apprehended in Spokane (The Billings Gazette 10/6)
FBI: Man suspected of killing 3 on Montana’s Crow Reservation arrested in Washington state (AP 10/5)

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Manhunt underway for homicide suspect on Crow Reservation (10/5)