Brownwood Police Sgt. Vince Ariaz, 53, a 17-year veteran of the department, was charged Tuesday with sexual assault of a child, law enforcement officials said at a press conference.

Officers from multiple law enforcement agencies secretly watched Ariaz and a 15-year-old female member of the Police Explorers Post he had led, and arrested him at 6:25 a.m. Tuesday at the Brownwood Coliseum Annex.

Justice of the Peace Bryan Thompson set bond at $250,000.

Texas Ranger Nick Hanna, the lead investigator, was assisted by Brownwood Police Sgt. Troy Carroll and officers from several other local and state agencies.

See Wednesday’s print and Web editions of the Brownwood Bulletin for further details.