clothes soaking in the washing machine. the water appeared to be pink. >> unfortunately, we couldn't do a test of blood for it. was it blood that caused that pinkish tint? maybe. >> but perhaps the most surprising discovery in the nyces' home was a pair of men's loafers and on the bottom was a mysterious substance that couldn't be identified. scientist tested the substance with infrared analysis. that test revealed there were four different kinds of glue on the bottom of the loafers. but why would there be glue on the bottom of his shoes? investigators found the answer when they discovered pieces of plastic hidden throughout the nyces' home. >> pieces were hidden in children's toy boxes.