According to court documents, obtained by TMZ Sports, in addition to the DWI ... prosecutors also levied a misdemeanor leaving the scene of an accident charge against Charlo. Court records show officials formally filed the misdemeanor counts against the 34-year-old pugilist on Aug. 20.

As we previously reported, Charlo was first arrested in the case on May 6 -- when cops claimed Charlo slammed his red Urus into another car on a Brazoria County roadway.

Authorities say the professional fighter got into a verbal spat with the other driver after the wreck -- and then fled the scene.

Cops said they were able to track him down ... and claimed he showed signs of intoxication during ensuing questioning. Authorities ultimately alleged he had a BAC of .15 or more.

At the time of the arrest, Charlo's attorney, Kent Schaffer, said he and his client were "optimistic that there will be a good solution."