We broke the story ... a fight broke out at Scales 925 on Sunday night ... after a verbal argument inside the eatery spilled out into the parking lot.
During the incident, shots were fired ... and Rice was shot in the leg.
Cops say they have footage showing Rice running from the scene of the crime and ditching a gun by throwing it on a stairwell.
Rice was shown on footage getting into a Porsche and leaving the scene.
Police responded and pulled over the Porsche and found Rice Jr. bleeding from the leg -- while in possession of 240 grams of marijuana and $6,000 in cash.
He's been charged with reckless conduct and possession of weed.
Rice Jr. was a 2nd round pick in the 2013 NBA Draft ... and was waived by the Washington Wizards back in January. We're told Rice Jr. was exploring options to play overseas.
BTW, cops say the man who picked up Rice Jr. in the Porsche is Steven Pryor ... who was connected to Rice in a 2012 incident involving a gun.
According to reports, Rice was leaving Halo Lounge near the Georgia Tech campus in 2012 in a Cadillac Escalade when cops responded to shots fired.
When cops pulled over the Caddy, Pryor was a passenger in the car and admitted to firing a shot from a 9mm pistol but insisted it was an accident.
Pryor was arrested and charged with discharge of a firearm while under the influence.
Rice was also charged with a crime from the incident -- permitting unlawful operation of a vehicle. He was kicked off the Georgia Tech basketball team as a result.