NEW DELHI, July 10 -- Police on Wednesday arrested 23-year-old Nikhil Kumar, who allegedly slit the throats of his former live-in partner Sonal Arya and her friend's six-month-old child at Majnu Ka Tila on Tuesday, from Haldwani. Officers aware of the investigation said the accused killed the child in "revenge" as he suspected Arya of being pregnant and blamed the infant's father for helping her abort the child. Police said Nikhil suspected Arya, 22, of being influenced by Durgesh Kumar, the husband of her friend Rashmi Devi, at whose home Arya had been staying since June 24. "Nikhil believed that she had gotten pregnant recently and decided to abort the child. He believed Durgesh had helped her. Therefore, he bought a surgical blade from D...