On Thursday night, the MTV News special report "R. Kelly: When the Gavel Drops" will take a look at the impending court case against Kelly -- and the infamous videotape. Tune in at 10:30 p.m. ET.

R. Kelly is due back in court Friday for the latest in a series of hearings in advance of his trial in Chicago. It's been two years since the singer was indicted on charges of child pornography, and to make their case, prosecutors are going to have to prove three crucial things:

But how can they prove that, when Kelly insists that the man in the video is not him, and the girl in question insists that the girl in the video is not her -- even though 50 people acquainted with her claim that it is?

Prosecutors hope to overcome these claims with facial and body comparisons. They also have more tools to use -- and more obstacles to overcome than merely trying to prove the identities of the people on the tape.

For the most complete overview yet of the case against R. Kelly, see our feature [article id="1487946"]"R. Kelly: When the Gavel Drops,"[/article] and be sure to tune in to "R. Kelly: When the Gavel Drops" on Thursday at 10:30 p.m.