A Mississippi police officer who was accused of sexually abusing a 15-year-old girl in his patrol cruiser killed himself after the allegations surfaced, authorities said.

A Jackson police spokesman said the officer — who had been placed on administrative leave Saturday after department brass learned of the accusations — was found fatally shot in a Dodge Charger on Interstate 220 Monday afternoon, the Clarion Ledger reported.

Jackson Mayor Chokwe Antar Lumumba identified the officer to WLBT as James Hollins, 29. Hollins was found dead inside his personal vehicle and shot himself with another officer’s service revolver, Lumumba told the station.

“Any time there’s a case or an allegation of sexual misconduct, it’s deeply troubling to me,” Lumumba said. “Being the father of two young ladies, I understand the fear that every parent has with respect to that.”

Jackson police spokesman Roderick Holmes told reporters Monday that the department had opened a criminal and internal investigation into the officer after an attorney representing the teen’s mother said Hollins had sex with the girl several times a week over the past six months.

“All matters involving assault we take very seriously,” Holmes said. “We want the family to understand that if at any point in time, there’s evidence of wrongdoing going on, we will not hesitate to take action.”

Attorney Lisa Ross said several explicit videos showed Hollins and the girl, whom he previously approached and later befriended, having sex in the back of his patrol car. The girl’s mother learned about the alleged encounters and reported them to police on Saturday.

Lumumba said Police Chief James Davis told him about the accusations on Sunday and that the teen’s mother had shown videos of Hollins and the girl to the police chief.