People have been wrongfully convicted of crimes in the United States, and it's happened more than once. Outlying instances don't establish the standard.
It's one thing to be wrongfully convicted or accused of a crime when there's substantial enough evidence to warrant it. It's another when you're detained and imprisoned for having purchased an internationally legalized medication OTC, because a foreign agency has a highly warped perspective on what fairness and culpability really mean. Oh yeah, and substitute the medication with a poppy seed bagel. Makes even more sense.