MARIES COUNTY -- An off-duty Highway Patrol trooper was at the center of a standoff between her ex-boyfriend and Maries County Sheriff's deputies.
Investigators say the trooper was held by her ex-boyfriend, Clifford Karst, of Warrenton, at gunpoint.
When deputies arrived, they heard a single gunshot.
The trooper exited the residence unharmed.
Deputies entered the home and found 42-year-old, Karst with what appeared to be a self-inflicted gunshot wound to the head.
An autopsy is scheduled for Thursday.
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