A personal security officer (PSO) of BJP MLA and former Chhattisgarh Minister Brijmohan Agrawal on Thursday committed suicide by shooting himself with his service pistol here, police said. Constable Vishambhar Rathore (36) shot himself in the morning, Raipur Senior Superintendent of Police Ajay Kumar Yadav said. Rathore, who hails from Madhya Pradesh, had been deployed as the PSO for Agrawal for the last eight years and he lived in Shanti Nagar area.Investigators found a suicide note from the constable's house, the officer said.