The Death Watcher

It should have been a routine autopsy on a straightforward hit-and-run.
It should have been an open and shut case.
It shouldn't have led them to a serial killer or put one of their own in danger.  

When the LA Chief Medical Examiner, Dr Carolyn Hove, discovers some inconsistencies in a routine autopsy, she calls in Detective Robert Hunter of the LAPD Ultra Violent Crimes Unit. Not only was the victim not killed in a hit-and-run, but Dr Hove also found signs that they'd been severely tortured prior to death.

Their investigation leads Hunter and his partner, Carlos Garcia, on the trail of a twisted and clever killer who hides in plain sight. A serial killer no one even knew existed a killer who has always operated under the radar, expertly disguising every gruesome murder as an accidental death.