He was convicted by a TADA court in a 1993 Delhi bomb blast case that left nine people dead and injured 31.

[2][3][4][5] On 11 September 1993, a car bomb exploded outside the offices of the Indian Youth Congress on Raisina Road in New Delhi, killing nine people.

The primary target for the mid-day bombing was identified as Maninder Singh Bitta, a vocal critic of Khalistani separatists, who was leaving the Youth Congress offices in his car.

Bhullar's sympathizers argue that he was targeted solely for supporting the Khalistani separatist cause and for speaking out against injustices in Punjab during the 1980s, in particular students missing after police encounters, Operation Woodrose and the 1984 sikh killing.

Devinder Pal Singh Bhullar has gone in appeal over the judgement of the trial court and his conviction was upheld at all the stages.

Finally, a Presidential pardon was sought by him and granted on ground of inordinate delay in deciding his mercy petition and his schizophrenia.

His plea was rejected by the German government in 1995 and he was extradited back to India to face charges of terrorism although on the basis of Bhullar receiving a fair trial and not being subjected to capital punishment.

However, on 1 December 2006 in the Chandigarh and Haryana High Court the judge acquitted Bhullar on the basis of lack of evidence.

Bhullar appealed against his execution on the grounds that his petition for mercy was kept pending by the President of the country for eight years, an unnecessary delay.

On 31 January 2014, the Supreme Court of India issued notice to Central Government on Bhullar's curative plea seeking commuting his death sentence to life imprisonment.

[15] On 31 March 2014, a bench of the Supreme Court, headed by Chief Justice P Sathasivam, commuted Bhullar's death sentence to life Imprisonment on the grounds of inordinate delay in deciding his mercy petition and his schizophrenia.

[3] The European Parliament passed a resolution stating that India should abolish the death penalty and grant clemency to Bhullar.

[17] The Chief Minister Of Delhi, Arvind Kejriwal, wrote to the President of India recommending clemency for Devinder Pal Singh Bhullar.

However, AAP leader and Delhi minister Saurabh Bharadwaj vehemently denied the allegations and said it was "another conspiracy" against Kejriwal.