KANPUR, April 21 -- The murder was not a crime of passion but carefully calculated, police investigation has revealed. Shashi Ranjan Mishra, bought the cleaver five days before the crime. He purchased it for Rs 500 from Moolganj market and kept it hidden in a wardrobe, ensuring his wife remained unaware. Police said he had planned the killings several times before but lost nerve or missed the opportunity. "Mishra had bought the cleaver he used to kill his twin daughters five days before the crime, concealed it in his bag, and waited for the right moment," police said. On the intervening night of Saturday and Sunday, spread over 105 minutes between 1:50 am and 3:35 am, Mishra allegedly carried out both murders. He killed the stronger daughter first, fearing that if he attacked the other one first, her sister might wake, resist, or alert Reshma. He strangled her with both hands, then cut her throat with the cleaver. When the second girl woke and went to the bathroom, Reshma saw them walk past. When they returned and the light went off, she tried to look into the room but could see nothing in the dark. Once the child fell back to sleep, he killed her too. CCTV footage allegedly showed him sitting near the bodies for nearly an hour before making the emergency helpline call around 4:30 am....