Missoula, MT (KGVO-AM News) - A Lake County teenager is dead following an accident that occurred early Sunday morning at the Mission Dam near St. Ignatius.

Lake County Sheriff Don Bell provided the details to KGVO News.

“On November 20 at about 0300 hours, (3:00 a.m.) Lake County 911 took a report that an injured and unconscious 17-year-old male was located in the roadway near Mission Dam by his family,” began Bell. “The family loaded the injured boy in their vehicle and rendezvoused with EMS (Emergency Medical Services) in St. Ignatius.  Lake County Deputies also responded to investigate."

Sheriff Bell said the teen was reported to be deceased and identified the victim.

"Upon meeting with EMS, it was determined the 17-year-old was deceased," he said. "The deceased was identified as David Hammer Jr. of St. Ignatius.”

Sheriff Bell described the investigation into the teen’s death.

“Lake County Deputies and detectives commenced an investigation throughout the day which resulted in the arrest of 18-year-old Tommy Mahseelah, from St. Ignatius, who is currently booked into the Lake County jail on charges of negligent homicide and leaving the scene of a motor vehicle accident,” he said. “Further investigation by the Lake County Sheriff and Coroner’s Office is underway and the decedent is being examined at by the State Medical Examiner at the State Crime Lab in Missoula.”

No other details were released by the Lake County Sheriff’s Office.

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