Sholanda Mixon -- the sister of Joe Mixon -- has been named as a suspect along with one other in the shooting incident at the NFL star's home earlier this week ... this according to new police documents, obtained by TMZ Sports.
According to a Hamilton County Sheriff's Office incident report, several juveniles were playing a game called "dart wars" near Joe Mixon's house in Cincinnati on Monday at around 8:25 PM -- when the shooting occurred.
Police in the docs say two of the participants in the game told them one of the other players -- a 16-year-old boy -- had ran alongside his house with a "Nerf" style toy gun when he suddenly came under fire.