In " Eyewitness " ( 1993 ) , Tessa witness the brutal murder of former artist Anne Wheeler ( Diana Barrington ) , and react angrily when she realize that the police will do nothing about it , saying : " I 'm not hysterical , I don 't see things , and I 'm not looking for attention . I just want something to be done . " She decide to find the murderer on her own . When MacLeod tell Tessa that she is stronger than Anne , and that if something happened to him she would be fine , Tessa retorts , " You only think so because it suit you . " The murderer is Chief Police Officer Andrew Ballin ( Tom Butler ) who is beheaded by MacLeod after Ballin failed to kill Tessa .