Two days ago, one of the other crews had an intoxicated prisoner in one of the cells. They filled out a property form and asked him to sign for the items that they had taken for safekeeping. His name was Isaac.
The first attempt at a signature was painfully slow.... then he scribbled it out, presumably due to a spelling error. His next attempt stuck. This is how he spelled "Isaac":
That's right. "I - Backwards 3 - Backwards 3 - 9 - C".
I've encountered a number of illiterates already, but none that couldn't spell their own name. Wow.
Remarkably, his last name was correctly spelled on the first attempt.