Kanpur, Oct 17: A police constable shot dead a colleague along with her two sons in the district jail campus here last night following a tiff, police said today. Fifty-year-old constable Kirta Panday and her sons were allegedly killed by Munindra Shukla after heated arguments over a trivial matter, they said. The trio died on the spot and the accused along with his son and daughter-in-law have been arrested, they added. The weapon used in the crime has been recovered, police said, adding two sons of the accused are absconding and efforts are on to nab them. Bureau Report