By Will Stewart & Mataeo Smith This is the moment the accused terrorists from the Moscow massacre at Crocus City Hall are seen being frogmarched while blindfolded into the Russian Investigative Committee to be grilled over the mass slaughter/ They are held tightly as they are frogmarched into the building. Separate footage shows the arsenal left behind by the gunmen who staged a bloodbath at the concert venue. When the killers wrong-footed Putin’s law enforcement and made their getaway after just 15 minutes, they left an arsenal behind. Officers said they found four sets of combat ammunition ,…