Suspicious behaviour can be hard to judge absolutely and usually relies on instinct. While it’s important not to assume or hold prejudices, exercise caution if you or your colleagues are being watched closely, but have not been asked for help. Conversely, if someone tries their best to avoid staff members, you have reason to be suspicious. It can also help to watch for specific behaviours, such as loitering or frequenting fitting rooms. Remember to always alert any on-site security guards and the local police if the situation escalates.