The chilling true story of a beautiful violin prodigy, her devoted boyfriend, and the devastating family secrets that led to a brutal murder.

Joyce Aparo seemed to be the perfect single mother. She doted on her sixteen-year-old daughter, Karin, encouraging her musical ability and lavishing affection on her. But behind closed doors, Joyce was a terror. For thirteen years, she beat Karin savagely, kept her away from other children, and demeaned her relentlessly. When Karin met the troubled yet brilliant Dennis Coleman, the two fell head-over-heels into lustful infatuation. But Joyce disapproved—so she had to die.

On August 5, 1987, Joyce’s body was found under a bridge near the Connecticut–Massachusetts border. She had been strangled, and was covered in bruises, with paper stuffed in her mouth and pantyhose knotted around her throat. The police investigation soon dragged her horrific treatment of Karin into the open, and the teenage lovers became the prime suspects. Dennis eventually confessed to the murder, testifying that Karin begged him to kill her mother. But Karin had a very different story to tell, claiming to have no knowledge of Dennis’s plans. Was she manipulating the police the same way she manipulated her former boyfriend, or was she an innocent victim?

Based on meticulous research, court transcripts, and interviews with the survivors, Beyond Obsession is the definitive account of an American tragedy and the basis for a popular TV movie starring Victoria Principal and Emily Warfield.