At twenty-seven, PC Cass Rickman, who grew up amongst a large family in a chaotic Liverpool terrace, had already been in the force for six years before coming to Sun Hill. Transferring to the Met gave Cass her first chance to live away from home and she arrived at the station full of such tremendous energy and enthusiasm that some of the older stalwarts of the squad found it both exhausting and annoying. However, with her quick wit and lively nature, she rapidly made friends. Her greatest fault was her lack of tact – she tended to open her mouth before thinking, and put her foot straight in it. But her redeeming blunt honesty and openness made it hard for anyone to take offence for too long.
Cass left school early clutching only a handful of GCSEs, a bright but easily distracted teenager who spent too much time skiving and going out with the boys. When she grew bored with a dull job in an insurance company and got the sack following too many late nights and non-appearances in the mornings, her exasperated father persuaded her to apply to the police. But she failed the interview. This stopped her in her tracks and made her think – she had seen enough of the job by now to want it. Quickly, she reapplied and got in. Cass loved her job and took pride in doing it well. She arrived at Sun Hill determined to make her mark, and with characteristic verve intended to enjoy herself too.
Tragically, Cass met her untimely end as the final victim of the Sun Hill Serial Killer in 2002, much to the devastation of all her colleagues and friends, especially her dearest friend, P.C. Nick Klein, who sadly missed the opportunity to tell her how about his true feelings for her.