Private investigator Letty Valdez takes on a new case, but within minutes, the new client is shot and killed outside Letty's office. Letty sets off on a search to find the murdered client's teenage son. She becomes a target as she recovers a kidnapped infant, stops a serial rapist, uncovers a cybercrime, and deals with a vengeful criminal who wants to do her harm. Letty is backed up by her investigator trainee, Frankie Miranda, and her favorite man, Dr. Dan Ennis, who more than anything wants to keep Letty safe. Direct Evidence is a stand-alone novel and fourth in the Letty Valdez Mystery series.