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A St. Louis, Missouri cop who was arrested for killing his fellow officer during a game of Russian roulette may have forced the woman to participate in the dangerous game.

Nathaniel Hendren is accused of fatally shooting fellow police officer Katlyn Alix in the early morning hours of Jan. 24, according to PEOPLE.

Alix, 24, and Hendren, 29, were allegedly drinking in Hendren's apartment when the gun went off, killing Alix.

According to a probable cause statement obtained by PEOPLE, Hendren emptied the gun before putting "one cartridge back into the cylinder."

The two then took turns pointing the gun at each other and pulling the trigger, the probable cause statement says.

At one point, Hendren pointed the gun at Alix and the gun discharged, striking her in the chest, the report says.

Alix, a patrol officer in her second year on the force, was pronounced dead upon arrival at a hospital.

Hendren's law enforcement partner, Patrick Riordan, who was also in the apartment that morning, were both on duty when Alix was killed. Alix was off-duty.

Alix's mother Aimee Lynn Wahlers, filed a wrongful death lawsuit in St. Louis Circuit Court on Wednesday.

The lawsuit alleges that Hendren forced other women to play the deadly game in the past, the AP and the St. Louis Post-Dispatch report.

The lawsuit also alleges Hendren forced ex-girlfriends to engage in sexual activity that involved firearms, the suit says.

Wahlers says the city should have known that Hendren allegedly had a psychiatric history before hiring him, the St. Louis Post-Dispatch reports.

Hendren, who is free on $100K bond, pleaded not guilty to first-degree manslaughter. He has been suspended from the police force and is currently awaiting trial.