Crime Scene DS help

I'm stuck at case 3. After visiting hotel, I got the paper/file with two fingerprints. I got the first finger print on the right, but I can not get the second finger print on the left. Every time I try to unfold the fingerprint tape it keeps telling me it's short.Anyone have any idea?

Nope,
Haven't play it.
But try search for a walkthrough at www.gamefaqs.com