Six Flags Great America and its Hurricane Harbor water park are bringing back their chaperone policy a week after shots were fired in the Great America parking lot.

Six Flags Great America will reintroduce a chaperone policy later this week, the amusement park announced Monday. Guests 15 years old and younger must be accompanied by a parent, guardian or adult chaperone who is at least 21 years old to enter and stay in the amusement park or Hurricane Harbor,