(WSFA) - NBC affiliate WSFA reports that court documents released on Friday have revealed that a sexual assault involving an on-duty Montgomery police officer happened while the victim was being held at gunpoint.

The officer, identified as Deonte Lashawn Hamner, allegedly forced the victim to perform oral sex at gunpoint, according to those documents. Investigators say the sexual assault happened on June 9th between the hours of 8 p.m. and 10 p.m. 

An investigation into the sexual assault began Tuesday. The police department says disciplinary proceedings have begun against Hamner, who has been placed on administrative leave.

Hamner graduated from the police academy in 2014.

Read more at WSFA's website.