An 'encounter specialist' sub-inspector, who was instrumental in the killing of 68 terrorists in the Doda-Kishtwar belt, was on Tuesday arrested for allegedly running a terror module in Jammu and Kashmir. A recipient of President's gallantry award, SI Shiv Kumar Sharma was arrested in Doda for his alleged involvement in terror activities, official sources said. State Minister for Home Sajad Ahmed Kitchloo confirmed the arrest and told PTI that investigation is in progress.