Adler and Dwyer thrillers

"When police investigator Susan Adler is called to the roadside murder of a fellow state trooper, she's tasked with finding the people responsible for the cold-blooded act caught on the trooper's dashboard cam. She traces the car to a nurse who, along with her elderly patient, has been missing for days. At the old man's house, she finds disturbing evidence that instantly revives two cold cases involving long-missing children. The investigation takes...