Two Steubenville, Ohio, football stars are now on trial for the rape of a 16-year-old girl who prosecutors say was "too impaired to say no, too impaired to say stop."

Trent Mays and Ma'lik Richmond, both 16, allegedly assaulted the girl at a series of end-of-summer parties and then bragged about it online, via pictures and over text messages.

Prosecutor Marianne Hemmeter said in her opening statement that the teens "treated her [the girl] like a toy." Hemmeter detailed the degrading abuse she said the girl suffered at the hands of the boys, including having her clothes stripped off, having people offer to pay the boys money to urinate on her and ultimately, sexual assault.

Hemmeter said witnesses will testify that the girl was highly intoxicated and was stumbling, slurring her speech and at times was unable to walk.

Defense attorneys say the boys are innocent. In a brief opening statement, Mays' defense attorney told the judge that his client did not rape the girl. Richmond's attorney did not make a statement.

The teens are being tried in juvenile court. The judge has ruled that the trial will be open to the media and the public, although many witnesses have declined to be on camera.

Evening Express will bring you updates on this case weeknights 5 p.m. to 7 p.m. ET on HLN.