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.

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.