 And he's trained to detect a certain chemical that's on all storage devices. It's TPPO is the chemical that he's trained to hit on. He tells 2 News Oklahoma Roscoe helps in a lot of Oklahoma cases, but this was his first international case. He says Roscoe has an essential job. One overlooked cell phone, computer, or micro SD card could lead to another victim or put a perpetrator away for a long period of time. I'm Eric Likes.