Hobo-killin' grannies

Helen Golay, 75, and Olga Rutterschmidt, 72, had a system. They would befriend homeless men and offer them apartments. Once they gained their trust, they would get them to open several insurance policies naming the women as beneficiaries.

After letting the men live off of their "kindness" for a couple of years, the killer grannies would cash in. They would gun down their victims with their cars and speed away.