A Crow Agency man accused of drunkenly crashing his truck near Lodge Grass in August has been charged with involuntary homicide in federal court.

Gus Oldbear, who was 19 at the time of the crash, also faces two counts of assault resulting in serious bodily injury. His arraignment is scheduled for later this month.

Oldbear is accused of being the driver in a crash that killed 21-year-old Christian Stewart, of Crow Agency, on Aug. 10.

The crash, reported at 8:40 a.m. on the frontage road along Interstate 90, occurred after the northbound truck appeared to have driven off the road and over-corrected, according to a crash report provided by the Montana Highway Patrol.

The Dodge Ram struck an embankment, rolling several times and ejecting two of the occupants, according to MHP. The narrative does not state which occupants were ejected, but notes the two passengers in the truck were not wearing seat belts.

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Stewart was pronounced dead at the scene of the crash, the report states. Oldbear and a 17-year-old girl were taken to the hospital in Crow Agency with injuries, and one of them was flown to St. Vincent Healthcare in Billings, according to MHP.

The federal indictment, submitted by Assistant U.S. Attorney Lori Suek, does not include the names of the victims, listing them only as "John Doe #1," "John Doe #2" and "Jane Doe."

The truck was believed to have only contained three occupants, according to MHP, including Oldbear. It's unclear from court documents who the assault victim identified as "John Doe #2," refers to, and a spokeswoman for the U.S. Attorney's Office was not immediately able to provide comment.

Oldbear was indicted in March, but charging documents were not unsealed until last week.

If convicted on all counts, Oldbear faces up to 28 years in prison and a maximum $750,000 in fines.

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