A week after a schoolteacher, his pregnant wife and six-year-old son were hacked to death in their home in Bengal's Murshidabad, the police have arrested a man from his hometown and have virtually ruled out any political connection. The murders were the result of a financial dispute, the police say. The arrested man, Utpal Behara, is a construction worker from the Sagardighi town where the murdered man, 35-year-old Bandhu Prakash Pal, grew up and where he taught at a primary school.