Like the family, we are monitoring developments concerning the possible arrival of ( Elian's father ) Juan Miguel Gonzalez in the United States,  said Robert Wallis, INS director for the Miami district. Government officials had threatened to (revoke) the boy's parole if his great-uncle, Lazaro Gonzalez, did not sign a document agreeing to hand Elian over to federal officials once the family's appeal in the 11th U.S. Circuit Court of Appeals was decided.  
 Verb: revoke
Yes