"You can probably brew that stuff for a long time, and not hurt anybody. But the first time you brew it, you don't get your recipe exactly right, the concoction you make could at the very least blind somebody, and at worst case scenario could kill a person who's drinking it. The concoction he was making could be deadly. Sure didn't look good."
I remember when I accidentally put an extra pound of roasted barley in my stout, and it killed a man.
I bet the cop felt like a ****** after he found out it was just homebrew.