“How did the jury find the hamburger?”/“Grill-ty as charred.”

A hamburger riddle is:
 
Q: How did the jury find the hamburger?
A: Grill-ty as charred.
 
The hamburger joke has been cited in print since at least 1978.
 
“What did the hamburger say when it pleaded ‘not guilty’?”/“I’ve been flamed!” is a related hamburger riddle.
   
   
Google Books
One Hundred and One Hamburger Jokes
By Phil Hirsch
New York, NY: Scholastic Book Services
1978      
Pg. 93:
How did the jury find the hamburger?
Grill-ty as charred!
 
26 May 2002, Houston (TX) Chronicle, “Forget apple pie / To much of the world, for better or worse, the burger is a symbol of America. You want fries with that?” by Renee Kientz, pg. E1:
Food for thought, anyway. “How did the jury find the hamburger”? “Grill-ty as charred.”
     
16 May 2008, Liverpool (UK) Echo, “Your Jokes,” pg. 18:
How did the jury find the hamburger? Grill-ty as charred!
 
Twitter
Hamburger Phone‏
@daBURGERphone
How did the jury find the hamburger?
Grill-ty as charred!
2:53 AM - 5 Jul 2009
 
Facebook
Burger Hub
May 7, 2012 ·
How did the jury find the hamburger? Grill-ty as charred!
 
Facebook
Old South Smoke House
January 29, 2015 ·
How did the jury find the hamburger?
-Grill-ty as charred!
 
YouTube
Ok, here is the joke. How did the jury find the hamburger? Gri…
botcaster inc. bot
Published on Jan 22, 2016
How did the jury find the hamburger?
Grill-ty as charred!
 
Twitter
Turtle Burger‏
@Turle_Burger66
But how about we brighten this Monday with a good old Joke of the Day: How did the jury find the hamburger? Grilled-ty as charred!!
1:59 PM - 22 May 2017