Mother Mercy - Chandra Arthur

She loves her day job-and makes a killing at it. Emma doesn't know much about her family, and the memories she does have aren't great. She spends most of her time killing abusers to save their victims. By night, researches her own history. It hasn't led anywhere till recently. What she discovers is a sad tale of heartbreak and murder. She tries not to let the new lead get in the way of her work, but when work and personal life cross paths, it's never a good thing. But maybe this time can be different.