Why the US cannot handcuff Indian diplomat Khobragade

This is why Foreign Secretary Sujatha Singh summons US Ambassador to India Nancy Powell in connection with arrest of its Deputy Consul General in New York. Diplomatic agents may not be handcuffed, arrested or detained; or be prosecuted no matter how serious the offense. Read

High-ranking Indian diplomat Devyani Khobragade was arrested and handcuffed in public in New York on Thursday for allegedly lying on the visa application for an Indian national who worked for her for less than four dollars an hour.