Pacman Jones will NOT be charged with a crime for his role in a late-night casino incident back in February ... after prosecutors say he couldn't have been more cooperative with police.
We broke the story ... officers responded to a "disorderly person" at the Hollywood Casino in Indiana after an incident with a casino employee.
But officials tell TMZ Sports ... while he definitely WAS causing a disturbance that night, he cut the crap when cops arrived to the scene and left the casino without further incident.
"He exited. No one got hurt. He did cooperate by leaving. Given all that – we didn't feel it appropriate to charge him," prosecutor Aaron Negangard tells us.