Stalking is following someone around in a way that makes them feel hunted or not safe in some other way. It is not just one event but an ongoing process that threatens or makes that person feel scared. Someone who does this is called a stalker. The stalker may do this because they want to be involved in that person's life or because they want to have power over that person's life. The stalker can hurt that person's feelings by making them scared. They may feel they do not have the power to stop the stalker. Psychologists say stalking is a way of hurting someone's mind with serious effects. Sometimes a stalker may go on to hurt that person's body by assaulting, raping or murdering that person.