The swift actions of four tactically trained “band dads” helped prevent a bigger tragedy after they took down an active shooter who opened fire at a band competition at a high school in Texas.

The Pasadena Police Department confirmed that 83-year-old Dennis Brandl was charged with aggravated assault with a deadly weapon after he allegedly opened fire at a local high school’s band competition.

Around 6 p.m. on Sunday, police, along with the Pasadena Independent School District and Angelton Independent School District, said an elderly male identified as Brandl walked into the entrance of the auditorium after a drum line competition. Officials said he was carrying a handgun and fired it.

He got off two shots, according to the Angelton ISD, with one striking a door and another hitting a 26-year-old in the shoulder. 

Officials say an 83-year-old man opened fire at a band competition at a Texas high school on Sunday night. (FOX 26 Houston)

“We are grateful for the brave citizens and the officers who were on the scene for security at the game and courageously stepped up to detain the shooter and prevent any possible further violence,” Pasadena police wrote in a statement on their Facebook page.

The Houston Police Department praised Sanchez and thanked him for this selfless act.

“When danger struck, HPD Sergeant Joe Sanchez didn’t hesitate,” the department wrote in a statement on X.

“While attending a band competition at a Pasadena school, Sgt. Sanchez was among those who quickly stepped up to protect lives. This month, he marks 33 years with HPD. We’re grateful for his service.”

The school district said Brandl was not affiliated with the band contest, and it is currently being investigated why he was at the campus.

Police said Brandl claimed he was being chased by someone and that he was afraid he and his wife would be killed.

He is currently being held without bond. 

“Our thoughts and prayers are with all involved. I am so proud of our staff members, police from our district and city, and community members who made sure there was no further harm that could have taken place,” Pasadena Independent School District Superintendent DeeAnn Powell wrote in a statement.

Stepheny Price is a writer for Fox News Digital and Fox Business. Story tips and ideas can be sent to stepheny.price@fox.com