Can RIAA sue for songs they never verified by downloading from you?

Glyn sez, "In UMG v. Lindor, the defendant Marie Lindor has made a motion to preclude the RIAA from introducing into the case songs as to which it has failed to produce the song files. Ms. Lindor's lawyers submitted to the Court the RIAA's interrogatory responses where the record companies had stated under oath that their case was based upon (a) Media Sentry's detection of song files being 'distributed' and (b) Media Sentry's allegedly making "perfect digital copies" of those files. Ms. Lindor's attorneys argued that the RIAA cannot prove that it made perfect digital copies of the songs if it doesn't have the song files."

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(Thanks, Glyn!)