Well, they exploit (via defense attorneys and humane laws re: prisoners) most every other leniency we provide them. But once they're convicted and incarcerated, should they volunteer as guinea pigs for medical clinical trials, they will incur a civilian lock-down under the supervision of both medical and correctional personnel. They would be doubly supervised and restrained. And should they be trying to FAKE symptoms to get out of jail free, they would be caught immediately by the docs and sent back to prison, maybe with a few years added onto their sentences for fraud. All I'm suggesting is that we give the repentant GUILTY the opportunity to expiate some of their "sins" in order to save the innocent animals and reclaim value as contributing citizens. I believe many would jump at the chance for societal redemption; and medical trials could proceed with HUMAN subjects; and the wildlife could be left alone to pursue the innocent lives they've lived for millennia.
Thank you for your interest. I love smart, thoughtful people even when we disagree on some things.