Ex-employee of my flower shop used to be a key designer and helped with actual floral projects has now started her own company. Ex-employee is now using pictures of projects/product that was done by her while working for my company and now has them posted with her new company. These pictures are part of her company portfolio to sell projects/product. Do they have the right to use the pictures when the projects were completed while employed with my company? Ex-employee used her own camera to take photos while on the job at my company. Also, how do I protect myself from this happening with other employees?