NASHVILLE, Tn. -- The bus driver who was charged in a 2016 crash that killed six Tennessee children was arrested Thursday on rape charges in Nashville.

According to WRCB-TV, a local NBC affiliate, the Davidson County Sheriff's office booked Johnthony Walker on one charge of statutory aggravated rape, a felony charge. He was jailed in lieu of $350,000 bond.

Attorney General Neal Pinkston's office has filed a motion to revoke Walker's bond from his Woodmore bus crash conviction.

Walker is the driver of the Woodmore Elementary School bus that was carrying 37 students when it crashed. He was convicted on the six counts of criminally negligent homicide and sentenced to four years in prison.

On Monday, 19 other crash victims were treated and released within two hours of arriving at Children’s Hospital. Six remain hospitalized. Dozens of cards, stuffed animals and candles have been left at the bus accident scene. (Joe Henke / WXIA)

WRCB said it had obtained an affidavit which says Walker admitted to having sex with a 14-year-old girl. The victim's parents called police after finding out their daughter had sex with Walker, "over the course of the last couple months," according to the affidavit.

The station said court documents reveal Walker admitted to staying with the girl's family over the last few months.

Walker was out on bond when he was arrested.

More 11Alive coverage of the Woodmore bus crash

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How you can help support Chattanooga bus crash victims

6 children remain in hospital after Chattanooga bus crash

Superintendent: Four girls and one boy killed in bus crash

A sixth child has died from Chattanooga bus crash