Head Constable Krishan Lal (40), posted as a security guard of former state BJP president Kamal Sharma, was found dead today at his residence in Basti Gol Bagh area in the city.Krishan accompanied Sharma at a religious programme in the cantonment late last night. Sources said he went back to his house after the function around midnight and had food at home before going out somewhere.Vibhor Sharma, DSP (City), said Krishan’s wife Radha said she got up around 2 am to check whether he was back home. She saw him lying in a pool of blood on a cot outside his room. The DSP said two bullets fired from Krishan’s service revolver had pierced his heart. Manminder Singh, SSP, did not rule out suicide.