• McPartlin, 45, sexually assaulted female inmate
  • He was transporting her from Fairfax to Loudoun County Jail
  • He was involved in fatal incidents in 2015 and 2016
  • He was involved in shooting Natasha McKenna

A sheriff's deputy from Fairfax County was charged on Tuesday for sexually assaulting an inmate in his custody.

Patrick D. McPartlin, 45, a Warrenton resident was arrested for object sexual penetration after he assaulted a female inmate in a county-owned vehicle while he was transporting her from the Fairfax County jail to the Loudoun County jail, the Washington Times reported.

In his 20 years of working at the sheriff's office, McPartlin had a history of involving himself in fatal incidents such as in 2016 when he fatally shot a hospital patient who was suffering a mental episode outside Inova Fairfax Hospital.

In 2015, he was part of a team of deputies that shot Natasha McKenna, mentally ill inmate, multiple times with a stun gun to restrain her.

A second and third suspect were arrested on Monday in connection to the kidnapping, sexual assault, drug abuse and attempted trafficking of an 11-year-old boy in San Antonio, Texas. In this representational photo, a handcuffed inmate meets with an attorney to update his case in the overcrowded Puraquequara prison in Manaus, Brazil, Feb. 18, 2016. Getty Images/ Mario Tama

McKenna died after she was hit with four Taser shots during a 15-minute struggle.

McPartlin is being held without bond and the Fairfax County Sheriff's Office declined to comment.