A poverty struck man gunned down his mentally retarded sister here in Lahore on Wednesday as he could not longer afford her medical treatment and fled the scene. According to police the incident took place at Mall Road, Lahore behind a well known business centre in dilapidated residential quarter where a widow Zeb-un-Nisa was residing along with her three sons and two daughters. According to Zeb-un-Nisa, all her children were normal at the time of birth but both daughters suffered mental case when they got matured. Rizwan s/o of Zeb un Nisa was the only bread earner of the family who was serving as salesman in a shop and the family was passing life in miserable condition due to poverty and two mentally retarded girls. The family members said that they had kept both girls tied with ropes as they try to flee from the home. One Wednesday Nousheen freed herself and tried to escape from the house when accused Rizwan approached her and shot her dead and fled from the scene. The neighbours claimed that due to poverty, Rizwan was not able to pay for medical treatment and medicines of his sisters therefore he shot dead one of them as he could not bear the burden of medical treatment. The police have registered a case against the accused and started search for him.