Dr. Glennon Engleman seems like a mild-mannered dentist, but in reality he has concealed a dark secret: he is a serial killer who devises elaborate schemes to extort and murder his victims. Part 1.Dr. Glennon Engleman seems like a mild-mannered dentist, but in reality he has concealed a dark secret: he is a serial killer who devises elaborate schemes to extort and murder his victims. Part 1.
