TRENTON, NJ (CBS) – Gov. Christie is calling on the Cuban government to hand over a convicted cop-killer before diplomatic relations between the U.S. and the Caribbean nation are restored.

Christie, a potential 2016 Republican candidate for President, criticized Cuba during an international business conference at the State Department on Tuesday.

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“I have no problem with Cuba being welcomed back into the family of civilized nations, but you have to be civilized,” Christie said. “And harboring a cop-killer is not civilized conduct.”

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In 1979, Joanne Chesimard broke out of prison and fled to Cuba, where she was granted asylum.

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Last week, President Obama proposed removing Cuba from the list of countries identified as state sponsors of terrorism.