CNN: The man now alleged to be a Russian spy was studying at the prestigious Johns Hopkins' School of Advanced International Studies, an elite graduate program favored by US military personnel, young diplomats and, sources say, future spies. ... "Muller" graduated from SAIS in 2020. Last week, a Dutch intelligence agency publicly identified him as Sergey Vladimirovich Cherkasov, a Russian military intelligence officer who in April traveled to the Netherlands to start an internship at the International Criminal Court (ICC). From there, he would have had a perch to spy on war crimes investigations into Russian military actions in Ukraine and elsewhere, sources say.