The justices must decide whether a law known as the Alien Tort Statute permits US courts to rule on that case.

BBC: US Supreme Court to hear landmark cases

In that case, he is accused of being an illegal alien, possessing four firearms and false identity documents.

BBC: Eddie Maher

The court heard arguments in February, only to kick the case back with a crucial question: Does the Alien Tort Statute allow such lawsuits at all?

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