A new U.S. Supreme Court ruling likely slams the door on the ability of the family of a teen killed by a Border Patrol agent in Nogales to sue him and, by extension, the federal government.

The federal government has given up on its last chance of trying to convict a Border Patrol agent for the 2012 shooting and killing a teen by firing through the border fence.

A new ruling Monday from the U.S. Supreme Court could prove good news for the mother of a Mexican teen hoping to sue the Border Patrol agent who shot her son.