Earlier quoted context omitted.
The opposite is true as well. A US person can be federally charged for violating a foreign law while overseas. The example used when I read of this was a guy convicted for wrapping lobsters for shipment in Nicaragua in wax paper instead of a bag (or something along those lines). It was very strange because the violation in Nicaragua was a misdemeanor, but the US law for committing a crime is a felony.
That sounds like the lobster seller was charged under the notoriously broad Lacy Act, which I have heard most often in arguments that is is impossible to be cognizant of everything that is illegal in the US, since this law roughly imports foreign laws. My understanding is it makes it a federal crime to trade in wildlife or plants that are illegal under the laws of a state, a Native American tribe, or any foreign law.…
https://humanevents.com/2014/05/30/the-true-villains-behind-...