The Devil's Dollar

Evil in its purest form. A man who cuts a trail of death, but leaves no footprints, no clues. Investigator Ben Masterson knows no man is perfect and that somewhere, some day the killer will make a mistake. When he does, Ben will trail him to the ends of the earth, if necessary, and bring him down. Or die trying.
When two FBI agents are brutally executed in an apartment leased by a convent, Ben cant say No, when a nun and childhood friend asks him to take the case, never imagining it will send him hurtling to a face-off with a serial killer and child rapist and come to a dramatic end in a battle that will leave only one of them standing.
Along the way to the face-off with this monster, Ben learns love is not always what it seems, that good is not always completely pure, and evil sometimes contains a kernel of white light. Most importantly, he learns just how far hell go to bring down a killer. As far as it takes even if that means making a bargain with the devil himself.