Agenis Apdul Santos, 42, was taken into custody Wednesday, roughly six hours after the student reported the alleged assault to a school resource officer that morning, police said. He faces charges of indecency with a child by contact and sexual assault of a child.

Investigators said the victim was not a member of the boxing gym. Police said Santos is no longer associated with the gym and that additional charges are expected as a team of investigators continues working the case.

Garland police have asked the 9th Street Gym to temporarily shut down while the investigation proceeds. The building where the gym operates is owned by the city of Garland, according to police.

According to its website, the Garland Police 9th Street Gym has offered Garland youth free boxing training, positive mentorship, educational support and life skills since 1995.

The case highlights what child welfare advocates describe as the lasting toll of sexual abuse on young people. Dan Powers, CEO of the Children's Advocacy Center of Collin County, said the harm reaches into every corner of a child's life.

"It affects their mental health, their physical health, their education, their relationships. There's not a part of their life it doesn't affect," Powers said. "A lot of people think child abuse is just a physical thing, and it's not. It's an emotional thing. It's something that touches a child's soul and changes the direction of their life."

Powers noted that most child abuse is committed by someone the child knows, which can make it especially hard for victims to come forward.

"It may be somebody within their home, could be a coach, a pastor, a mentor, somebody within your life. Often it's somebody they care about and that dynamic makes it really difficult for children to let somebody know that someone's hurting them," he said.

The investigation into Santos remains ongoing.