Dallas Police Association confirmed that Sr. Cpl. David Kattner died in an apparent suicide.
Kattner was arrested in December and charged with sexual assault.
He allegedly used his position as a peace officer to contact known female prostitutes and compel them to perform sexual acts while working an extra job, police said.
The officer was a 26-year veteran of the department assigned to the Northeast Patrol Division.
He was on administrative leave while the case was being investigated.
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