Police are searching for a youth who exposed himself to a female while she was at work in Chesterfield town centre yesterday.
The incident happened at Marks and Spencer just after 4pm yesterday.
The woman was dressing a window at the store when the youth, who was with a group of teenages, exposed himself.
He was wearing a stripy top and a red hoodie.
Anyone with information should contact Derbyshire Police on the non-emergency number, 101.