Punjab Chief Minister Bhagwant Mann on Saturday handed over the 467-page report of the special investigation team of the Punjab Police to Sikh leaders.
Singh's letter prompted the opposition Congress to attack the AAP government, asking it to clear its stand.
Gurdwara caretaker Amarjit Singh had earlier claimed that he saw the victim 'disrespecting' a Sikh religious flag.
While the SAD dubbed the move as "political vendetta", the Congress welcomed the move by the officials.
Punjab police SIT team questions Dera Sacha Sauda sect chief for more than 7 hours in sacrilege case
Gurmeet Ram Rahim Singh is currently lodged in Rohtak's Sunaria jail since his conviction in 2017 for raping two disciples.
It was observed by the House that, even after a lapse of three years from such entrustment of investigation, no report has been filed by the CBI.