The U.S. Attorney’s Office says Franklin Joseph Perkins previously worked at the Kuk Sool Won martial arts studio and Gulf Coast Gymnastics, both located in Alvin.

A former martial arts instructor and gymnastics coach who worked in Alvin has been charged with multiple child pornography-related crimes following an investigation.

It's not clear where, but authorities said the 39-year-old coach is known to work with children, teaching them martial arts and gymnastics.