Investigators soon realized a fire had been set to cover up the murder of a young woman, Anne Harper.

For years, parents have worried their trick or treaters might be poisoned by an unsuspecting neighbor on Halloween, but is there any validity to the myth?

Doreen Erbert opened the door on Halloween night in 1984 and found a man wearing a big, bad wolf mask, carrying a machete in a terrifying slaying that played out in front of her young 4-year-old daughter.

After finding Sue Marshel and Melinda Marshel's skulls in a duffle bag, an investigator said it “was the most horrific thing I could ever imagine seeing.”