Cold justice

"Late one night, an emotionally disturbed woman, Abigail Macy, witnesses a murder. She reports what she saw to the police, but out of fear the killer will return to eliminate her as a witness, she keeps quiet about his identity. When the police investigate her claim, they find no evidence of a crime and, influenced by her psychiatrist's diagnosis that she was delusional, they close the case. Abigail's condition deteriorates, and she shuts herself away, withdrawn and distraught, refusing to speak to anyone except the occasional word to her husband. To ease her tormented mind, he hires private investigators Jake and Annie Lincoln to find the supposed killer, with no proof one exists" -- back cover.