joseph deangelo, a former police officer, killed 13 people and raped more than 50 women between the years 1975 and 1986. all across the state of california. police finally caught up with him in april after they matched dna evidence through a public genealogy database. deangelo, now 73 years old, is in jail awaiting his trial. number seven, a pregnant mother murdered at the hands of her husband. after pleading for his missing family to come back -- >> if somebody has her, just please bring her back. >> 33-year-old christopher watts pleaded guilty in the killings of his pregnant wife and his two young daughters, bella and celest, just 3. >> the victim's family agreed to a plea bargain trading the death penalty for multiple life sentences without parole. >> you have to live with this