According to data available on NIA website, its Delhi office has registered 288 cases since 2009, of which 7 have been closed, judgment pronounced in 14 & part verdict given in 7.
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Read Bhadra Sinha's article here : https://theprint.in/judiciary/9-yrs-133-hearings-counting-a-ranchi-mans-case-exemplifies-endless-delays-in-nia-trials/1248928/