 Khalra was investigating four major cases at one time and continued to collect evidence and witnesses.These cases included the custodial killing of Behla, human-shield case concerning the death of seven civilians, cremation of 25,000 unidentified bodies in Punjab and that police had killed about 2,000 policemen not collaborating in counter-terror operations.CBI concluded that police had unlawfully cremated 2,097 people in Tarn Taran district alone.