The Search by Nora Roberts

Fiona Bristow trains dogs and volunteers for canine search and rescue. In another life she was the one who got away from the Red Scarf Killer who now sits in prison with a life sentence. But now another serial killer is copying the Red Scarf Killer and Fiona is afraid he will be coming for her next.
Nora Roberts has a website and also writes under the name of J. D. Robb. She has written several trilogies and you can read about them here: www.noraroberts.com/