the word roc being written on the wall. next she looked for fingerprints in the letters themselves. sounds impossible, right? >> if she's writing and applying pressure to the wall you'd think there would be some type of transfer of ridge detail. >> ridge detail, we all have it. unique tell-tell patterns on every human finger and hand but anna wasn't finding that here. rather she detected an unusual pattern, something like polka dots. >> i thought to myself the garden glove on the counter missing it's match. missing it's pair. >> a garden glove was found in the kitchen and the mate was never located. it has a dot pattern. >> it's like rubber and it has those little nubby things that stick up for gripping purposes