Shah's brother claimed he went to Delhi recently to see Shah and talked to him for 20 minutes. "He (Shah) is being tortured on daily basis," he alleged.
During the protest demonstration in Kupwara, the family was demanding the state government to intervene in the matter.
Shah was arrested on March 20 by a special cell of the Delhi police from Uttar Pradesh after he crossed the Indo-Nepal border. The J&K police claim Shah was returning from Pakistan Occupied Kashmir under the state government's rehabilitation scheme for militants, who have decided to shun violence. However, the Delhi police claim he was part of a terror plot.
Later, on chief minister Omar Abdullah's intervention the case was handed over to the National Investigation Agency (NIA). The Delhi court on Tuesday allowed the NIA to quiz Shah inside Tihar jail up to April 30.
Meanwhile, union home secretary RK Singh was quoted in New Delhi saying "Shah will be released if the NIA finds that it was a genuine case that he had come to surrender".