Cold-Blooded (Jocelyn Rush #2) by Lisa Regan

Knox is a retired cop with not much time left.  He only has one open case and he's determined to find the answer before death.  He's not in good enough health to investigate and he's hoping new eyes will see something he didn't and find Sydney's killer.  He asks Jocelyn's private eye firm to help.  As a matter of fact, he comes directly to her home to ask her...

I won this book in a giveaway by the author and I really enjoyed it.  It's been published, so you can grab a copy now.

There was more than one victim and almost all the girls had a tie to the coach at the school.  He has an alibi for Sydney's death but Knox still isn't sure he's innocent.  As Jocelyn starts digging through the past trying to fit the puzzle pieces together, she finds several random deaths are related.

The investigation is interesting, the characters are complex and somewhere in plain view and acting normal is a psychopath.  There's good interaction between the characters.  Some things that she learns about would not be allowed in court but it does give her the knowledge she needs to keep looking.  

The killer was a shock to me.  This was an inhuman monster who loved controlling people and hurting them.  It's also very dangerous to hunt because it will strike back.

I read this one sitting because the tension was great enough I had to know what happened.  Give it a try.  You won't be bored.