Blood In, Blood Out — Julia Derek

A MURDERED HUSBAND.  A DANGEROUS PAST.Stay-at-home mom Kate Martinez's life is turned upside down when her husband is stabbed to death, leaving her with no means to support their toddlers. Detectives Cooper and White are put on the case, and their only lead is the unusual knife left at the crime scene. Naïve Kate insists neither she nor her husband have any enemies.But as the weeks pass, she learns that her husband wasn't at all the man she'd thought he was. Not only did he once belong to a street gang, but he was one of the gang's most vicious members. What other secrets did he keep from her? By the time she figures everything out, it's too late.NOTE: This murder mystery was once published as Sins of the Past. A lot is different in this new edition. No sex or violence.