New Delhi, Feb. 1 -- Police on Saturday said they arrested a 36-year-old man who went on the run a day earlier after brutally murdering his 12-year-old stepson following an argument with the boy's mother in northeast Delhi's Shastri Park. The accused, an e-rickshaw driver, told police he killed the child after fights with his wife over her two children, including the victim, moving back home from a hostel. He alleged that after the argument, the woman denied him sexual favours and went to a relative's house, and that he murdered the boy to teach her a "lesson". Police said they are investigating all claims made by the accused, who was nabbed from Ghaziabad after a day-long manhunt launched when the horrific case came to light on Friday when...