The instructor, identified as Argie Santos, is not a Garland police officer, according to the department. He remained in custody at the Garland City Detention Center as of Thursday, and police said additional information about the case would be released later.

Garland police said they are concerned there may be additional accusers who had inappropriate contact with Santos. Law enforcement sources said the accuser in the current case was not affiliated with the Garland Police Boxing Gym, but investigators are asking parents whose children were enrolled in the program to speak with them about any possible inappropriate contact with Santos.

The gym, which opened in 1995, was the idea of now-retired Garland officer David Swavey. It was created to give children from troubled homes a chance to learn the skills and discipline of boxing, and it has served an estimated 10,000 young people over its 32-year history.

"You're out there working the streets. You can tell there's a lot of kids that are misguided," Swavey said in describing the program's origins.

The closure marks a sharp interruption for an institution that has been a fixture in Garland's youth mentoring landscape, pairing officers and civilian coaches with kids outside of school hours. The gym's future operations were not immediately clear.

Police did not release further details about the charges against Santos or the circumstances of the arrest. The investigation is ongoing.