In court docs filed in Maryland, the accuser gives her side of the story in great detail ... and claims she first came into contact with Sanders at M&T Bank Stadium on Dec. 14th around 7:30 PM ... hours after the Ravens defeated the Browns.
In the docs, the woman -- who claims she works for a company that provides custodial/janitorial services for the Ravens -- claims Sanders hit on her ... telling her she was sexy and that he liked her.
The woman claims, "I could smell alcohol on him."
The woman claims Sanders groped her butt multiple times -- each time she swatted his hand away.
When she told Sanders he was out of line, he allegedly responded that he "did what he wanted around here."
After the incident, the woman says she immediately contacted her boss -- who contacted police ... and they immediately launched an investigation.
Cops ultimately found there was enough evidence to book Sanders with 4th degree sexual assault.
As for Sanders, he's on paid-leave from the Ravens -- but denies any wrongdoing.
Darren's attorney just issued a statement saying he will not appeal the Ravens' decision because he doesn't want to be a distraction -- but says he's innocent and "looks forward to his day in court."