The New York Times–bestselling journalist and serial killer expert recounts a tragic case of infanticide—including an exclusive interview with the killer.

It started with a horrifying discovery in an Arizona self-storage facility: the abandoned bodies of three infants wrapped in plastic. Dianne O’Dell, a mother of eight children, admitted the babies were hers. She claimed they’d died of natural causes; that she’d been impregnated by her father when young; that her own mother had forced her into teen prostitution.

O’Dell's life story ran a horrifying thread from tranquil Kauneonga Lake, New York, to the mountains of the Southwest. But would it lead a jury to grant her mercy? Or would she pay the price for committing the worst crime a mother can commit?