An FBI affidavit said a Russian government official tasked Hector Cabrera Fuentes, 35, with tracking down a vehicle owned by a U.S. government informantA Mexican scientist accused of spying for Russia in Miami will be detained without bail for now, a federal judge decided Friday. The temporary public defender for 35-year-old Hector Cabrera Fuentes said he agreed to remain in jail while his family works to hire a private lawyer. “If your circumstances change, you could certainly request a bond at a later date,” U.S. Magistrate Judge Chris McAliley told Cabrera at a brief hearing. “We do expect that you...