Book 1 of Kate Marshall 
 
Kate Marshall was a promising young police detective when she caught the notorious Nine Elms serial killer. But her greatest victory suddenly became a nightmare.

Fifteen years after those catastrophic, career-ending events, a copycat killer has taken up the Nine Elms mantle, continuing the ghastly work of his idol. Enlisting her brilliant research assistant, Tristan Harper, Kate draws on her prodigious and long-neglected skills as an investigator to catch a new monster. But there's much more than her reputation on the line: Kate was the original killer's intended fifth victim .

. . and his successor means to finish the job.
 
Robert Bryndza