Hall of Fame wrestler Rikishi says his niece was tragically murdered in a shooting earlier this summer ... and now, he's pleading with the public for help in finding who did it.
Rikishi re-posted a flier Tuesday from the San Francisco Police Department ... which he says spells out the horrific details of his niece's death on July 30.
In the bulletin, cops say they responded to a report of a shooting at around 6:45 PM ... and learned a 45-year-old woman and a 16-year-old girl had been shot.