Good Morning, Killer

Description for GOOD MORNING, KILLER by April Smith:

Something within Ana snaps after she rescues a fifteen-year-old girl from a sadistic sexual predator and realizes that following her brutal ordeal, the victim will never be the same. It's suddenly all too clear that the slow-turning wheels of law enforcement and big-city police politics are no match for a killer poised to strike. Only a force of equal cunning, speed, and disregard for the rules has any hope of stopping him. That force is Ana, and she will put everything on the line--both personal and professional--to see that justice...and revenge...are satisfied.

This is #2 in An Ana Grey Mystery.