In May 1930, his statement against Bhagat Singh, Sukhdev Thapar and Shivaram Rajguru, in the Lahore Conspiracy Case trial, became "crucial" in leading to passing of their death sentence .
[3] Against the wishes of his father, Vohra became a trusted colleague and follower of the leading revolutionaries Sukhdev Thapar and Bhagat Singh.
He was subsequently inducted into the Hindustan Socialist Republican Army and became a revolutionary organiser primarily arranging the distribution of leaflets and literature, in Punjab Province in the 1920s.
Although not directly involved with the bombing, Vohra,[7] then working in the offices of Bande Mataram ,[8] knew of its details through Sukhdev, and after his second arrest in May 1929, closed his testimony and "tendered pardon, the conditions of which I accepted".
In 1981, before he died, he addressed a letter to Sukhdev's brother, explaining why he testified and expressed the wish to be forgotten:[3][12] Mine has been a most difficult life, full of risks, but so far touch wood, I have emerged virtually unscathed, at least physically.
But the memory of the twenties accompanies me doggedly, teasingly and hauntingly….I hope by the time I die, I would have been fully forgotten, This is my only ambition.