David Shannon was a 40-year-old Army Major found dead in his Fayetteville, North Carolina, bed on July 23, 2002. He suffered close-range gunshot wounds to the forehead and chest; the bedroom bore blood splatter and brain matter, and investigators found no signs of a break-in and nothing missing from the house.

The investigation tied the killing to his wife, Joan Shannon, and his 15-year-old stepdaughter, Elizabeth Shannon. According to the case narrative, Joan had been involved with another man she met through a swingers’ club and persuaded Elizabeth to shoot David while he slept. Tests for gunshot residue included Joan, Elizabeth, and a friend, Vera Thompson; Joan tested positive but the residue pattern indicated she was not the shooter.

Joan was arrested on August 2, 2002. Elizabeth pleaded guilty to second-degree murder and testified against her mother; Joan was later convicted of first-degree murder, conspiracy and accessory after the fact and received life without parole, while Elizabeth received a 25 to 31 year sentence. Does anyone have further details about the family dynamics or the events leading up to July 23, 2002?