new delhi the national investigation agency nia has established that four nagaland government officers had made the banned insurgent group national socialist council of nagaland khaplang richer by over rs 20 crore in just four years by sharing with the outfit funds from the state exchequerthe federal antiterror probe agency has recovered payment slips and registers to this effect which establishes that the arrested officers were hand in glove with nscn k in its illegal tax collection racketthe four officers vilepral aja additional director of department of agriculture kohima purakhu angami former director of department of tourism kekhriesatuo tep superintendent of fisheries department and k hutoi sema executive engineer of irrigation and flood control department were arrested on october 13these officers maintained slips and registers in which exact amount and name of the person to whom money was to be given are mentioned the handwriting experts of central forensic science laboratory cfsl gandhinagar have confirmed that these four officers maintained these slipsregisters said a sourcean assessment of payment slips and other documents suggests that arrested officers have handed over somewhere between rs 20 to rs 25 crore to nscn k and other factions since 2012 said the officersources say that while s khetoshe sumi finance in charge of nscn k who was arrested last year was extorting money from state government officials instructions were coming from isak sumi a myanmarbased key member of the outfit who handles all the finances for antiindia operationsin a chargesheet filed earlier this year against isak sumi khetoshe sumi and another finance collection agent victo swu nia claimed that they raised funds through illegal tax collection and extorted money from government offices to support the banned organization in its activities