The women and children Repression Prevention Court here yesterday sentenced a man to life imprisonment for killing a physically challenged girl in 2006. The convict is Khairul Islam Master of Malbagdanga village in Sadar upazila. The judge acquitted two others. According to the prosecution, Khairul strangled his neighbour, physically challenged Edanur, 20, at a paddy field at the same village on August 28, 2006.