In 1986, Donna Jester thought she was doing something nice for a down on his luck guy.  She didn't realize that she had invited the devil into her home in Lancaster, TX.  David Martin Long brutally killed Donna, her mother Dalpha, and Laura Lee Owens with a hatchet.

Sources:

https://the cinemaholic.com/who-were-david-martin-longs-victims-how-did-the-texas-axe-murderer-die/

https://law.justia.com/cases/texas/court-of-criminal-appeals/1991/69781-4.html

https://serialdispatches.com/serial-killer-david-martin-long/

https://murderpedia.org/male.L/l1/long-david-martin.htm

https://www.upi.com/amp/Archives/1986/10/01/Police-investigating-the-hatchet-slayings-of-three-women-issued/4131528523200/

https://www.mytimes.com/1999/12/09/us/texan-who-took-overdose-is-executed.html