June 1, 2015: Guru Granth Sahib goes missing from Burj Jawahar Singh Wala
October 12: Torn pages of the holy book found at Bargari village.
October 14: Police lathicharge on Sikh protesters at Kotkapura. Same day, two Sikhs killed in police firing in clash at Behbal Kalan
October 18: SIT headed by ADGP IPS Sahota set up and claims to crack the case but next day the police theory fell flat.
October 24: DGP Sumedh Saini removed. Zora Singh commission set up
October 26: Government hands over probe to CBI. SIT led by DIG RS Khatra formed to probe cases of sacrilege at Gurusar and Malke
June 30, 2016: Zora Singh panel submits report to government but no recommendation implemented
April 14, 2017: Amarinder government constitutes Justice Ranjit Singh (retd) commission
June 16, 2018: SIT led by Khatra cracks the cases
June 30: Ranjit Singh panel submits report
July 31: Amarinder announces CBI probe into police action at Behbal Kalan and Kotkapura
August 28: Vidhan Sabha debates Ranjit panel report as SAD boycotts proceedings. Resolution passed to take back cases from CBI
September 10: SIT led by ADGP Prabodh Kumar formed to probe police action at Behbal Kalan and Kotkapura.