A resident of Janak Puri,Nishu Kumar,was found dead on the roof of his house on Friday. The prime suspect of the murder,Nishus second wife Shashi Kanta is absconding,said the police. SHO Gurdev Singh said,Nishu did not know that Shashi was also married before and had two children from her first marriage. They used to fight a lot and Nishu wanted to end the relationship. The neighbours told us that the two often entered into arguments and one of them would go and sleep on the roof after a fight. Both of them hailed from Kangra. Nishu was found lying in a broken cot and bore a head injury,said the police. He met his uncle yesterday and asked him to help him end the marriage, the SHO added. According to the neighbours,Shashi had gone to Kangra yesterday and returned at 11 in the night. The couple entered into an argument again,said the police. Shashi is still absconding and has taken all her photographs from the house,the police added.