Thank you Anxala. I should have expanded my post to include my opinion that just as DM's case was on file corroborating what the witnesses had viewed on the tape, the anonymous rapes may be in police files also.
It's possible, I suppose, but I kind of feel that if that were the case, the two 'unknowns' would not have been presented as they were in the official charge sheet. ie. if the cases are on file, then the names of the victims would be known, the approx dates of the assaults would be known and they would have been listed in the same 'anonymous' way the two child charges were. That's my take.
I guess we'll see.