DICKINSON, Texas (KTRK) -- A Dickinson ISD teacher arrested for having an improper relationship with a 16-year-old student was being blackmailed by the victim, according to investigators.

Kristi Hanks, 46, was arrested Wednesday and charged with improper relationship between educator and student.

The Galveston County Sheriff's Office said the victim was enrolled in an alternative education program at the Galveston County Juvenile Justice Center where Hanks was teaching at the time.