The only "forensic" tests I performed to determine what the "warts" were made of was to first test them with very small magnets to see if they were iron or some other non-ferrous mineral and then scrape a sampling to examine and test. Both tests were sufficient "forensically" to established the total absence of your clients, Cal See-um and Lie M., at the scene of the crime.
Sorry, your clients will not be going down the river, nor up the river either for that matter. They'll just be fishing from the shore.
