The 48-year-old dual British-US national was taken into custody at the end of last month in Moscow, where his family said he was attending the wedding of a fellow former marine.
Isakhamuzi esinobuzwe obubili baseBhrithani nobase-US sifakwe ejele ngenyanga edlule eMoscow,, lapho umndeni wakhe obuthe uye emshadweni kazakwabo owayeyibutho lasolwandle phambilini.