The US can enforce it laws on anybody it can get its hands on. For example Joaquin Guzman, the drug kingpin recently captured in Mexico faces charges in a variety of US states, even if he never set foot there. [1]
Mexico has to agree to hand him over, but once the US has him, they can happily convict him of crimes committed while he wasn't physically present in the US.
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The US can enforce it laws on anybody it can get its hands on. For example Joaquin Guzman, the drug kingpin recently captured in Mexico faces charges in a variety of US states, even if he never set foot there. [1]
Mexico has to agree to hand him over, but once the US has him, they can happily convict him of crimes committed while he wasn't physically present in the US.
[1] http://www.npr.org/2014/02/25/282359473/arrest-of-el-chapo-n...
Oh, sure, but it's contingent on him being in the U.S. (Same for a company.) It is Mexico's decision to "extradite" him.
Similarly, Brazil could convict me of whatever it wanted if I went there. Then it just becomes a diplomatic issue.