Kayla Blake and her 13-year-old daughter, Kennedi McWhorter, were brutally stabbed inside their Kentucky home, sparking a frantic manhunt for Kayla’s boyfriend, Joshua Cottrell. After his arrest, Cottrell made bizarre claims about demons, insisted “that wasn’t me,” and then begged police for the death penalty in a chilling jailhouse interview. Law&Crime's Chris Stewart is On the Case.