Authorities have released the name of the deceased person from Thursday's incident on Highway 12 near East Helena .
The deceased man is 29-year-old Dekota John Renner from Helena.
The Lewis and Clark Sheriff's office believes the manner of death was suicide.
The Montana Department of Justice (DCI) continues their investigation.
The inquest time will be determined by County Attorney Leo Gallagher’s Office and Deer Lodge County Coroner Jessie Billquist-Jette.