A federal grand jury has decided there is enough evidence to charge a man from Porcupine, South Dakota, with Involuntary Manslaughter and Assault Resulting in Serious Bodily Injury.
Robert Cottier, age 64, pleaded not guilty to the Indictment.
The maximum penalty upon conviction is 10 years in custody and/or a $250,000 fine, and three years of supervised release for each assault count, and eight years in custody and/or a $250,000 fine, and three years of supervised release for involuntary manslaughter. Also $100 to the Federal Crime Victims Fund for each count and restitution may be ordered.
The Indictment alleges that on February 18, 2023, near Porcupine, Cottier killed a man by operating a motor vehicle in a grossly negligent manner. Cottier is also alleged to have assaulted four other individuals, three of which were minors.
The investigation is being conducted by the FBI and the Oglala Sioux Tribe Department of Public Safety. Assistant U.S. Attorney Anna Lindrooth is prosecuting the case.
Cottier was released on conditions pending trial. A trial date has been set for August 1, 2023.






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