Tater, 46, had been released from a psychiatric facility in Moscow where he had spent more than a month, News.az reports citing CBS.news.com.
In April Tater had been examined by doctors and diagnosed with a mental disorder, and then sent for forced psychiatric treatment.
Russian authorities accused Tater of mistreating hotel staff in Moscow after his initial arrest. Officials later said he was also under investigation for assaulting a police officer, a charge that could see him face up to five years in prison.
At the court hearing, Tater stated that he was being persecuted by the US Central Intelligence Agency and was seeking political asylum in Russia.
Russia imprisoned several Americans as tensions with Washington soared in recent years. Paul Whelan, Wall Street Journal reporter Evan Gershkovich and teacher Marc Fogel were all designated wrongfully detained by the U.S. government, along with dual U.S.-Russian national Ksenia Karelina.
All four of those Americans have been freed in prisoner swaps with Moscow.
Among the U.S. nationals still jailed in Russia is U.S. Army Staff Sgt. Gordon Black, whose three-year, nine-month prison sentence for robbing and threatening his Russian girlfriend was reduced in April by seven months.
Robert Gilman, 72, is currently serving a 3 1/2-year sentence in Russia for assaulting a police officer, and Travis Leake, a musician convicted on drug charges, was sentenced to 13 years in prison last summer.
A Russian court sentenced another 72-year-old American, Stephen Hubbard, to nearly seven years in prison in October for fighting alongside Ukraine’s military.
TASS quoted Tater’s lawyer, Polina Vlasyuk, as saying she had no information regarding his whereabouts or circumstances.
