Updated Feb. 27: Revised to include additional details from police.

A Mesquite youth pastor has been arrested after being accused of sexually assaulting a teenager for more than a year.

Steven Aaron Winn (Dallas County Sheriff's Department)

Steven Aaron Winn, 33, an assistant youth pastor at Open Door Baptist Church, was booked into the Dallas County jail early Thursday on three counts of sexual assault of a child. He also faces three counts of sexual assault of a child in Kaufman County.

Police said that the victim was 15 at the time the assaults began, and that the sexual relationship lasted for 14 months. Authorities learned of the allegations Feb. 18 and arrested Winn four days later.

The victim is a student at the church's Christian academy, police said.

Open Door told KXAS-TV (NBC5) that Winn was a volunteer, not an employee. The church had no other comment.

Winn, a Crandall resident, had worked in Mesquite's Public Works Department for 14 years until he was fired last week, police said.

He remained in custody Tuesday, with bail set at $75,000. Court records did not show any previous criminal history for him.

Police are continuing to investigate.

In 2011, the former senior pastor of Open Door was arrested on a rape charge in West Virginia. Two days after his arrest, Matt Jarrell hanged himself in his jail cell.