A former prison guard was gunned down by miscreants in front of the main gate of Kashimpur central jail in Gazipur at 11am on Monday. The decead is Rustom Ali. He was 50.Sub Inspector of Konabari Thana Mobarak Hosen said, in this incident one man named Saiful was detained. According to source, two miscreants riding by motorcycle shot him dead when Rustom was reading newspaper at pharmacy beside the Kashimpur central jail.