The Chameleon Killer Mystery

Who is the Chameleon Killer?
When you are having a really bad day, drink deep, abuse everyone around you, pass out and try again tomorrow.
Trouble is; every day is bad in Rupert Fletcher's world. He threatens his ex-wife, mocks his girlfriend, abuses his neighbours, and gets into a fight in the pub.
Next day, he is found dead.
Who'd want to kill him? Well, almost everybody, but it looks like only one person did. The police arrest his ex-wife's therapist, Anthony.
Anthony's family claim he is innocent and employ the SeeMs Detective Agency to find the real killer.
Cat, Miranda, and Stevie uncover clues that point them back to an intricate web of family injuries and an unexpected connection between the victim and his killer.
Could Rupert's murderer be The Chameleon Killer, who has already killed before and is bent on revenge? They need to act fast before the killer strikes again.