Rajendran, 50, his 45-year-old wife, their younger daughter, 19, and son, 15, were today found dead in their house at Pethanaickenpalayam near Attur, about 40 km from Salem, police said, adding the family members had consumed some pesticide.
Investigation revealed that Rajendran's 21-year-old elder daughter, who was preparing for state public service commission exam after her graduation, got married three days ago despite opposition from the family.
Later, the couple approached the police in Karipatti seeking protection.
The farmer took the extreme step because he was "ashamed" of his daughter's move and the need to visit the police station after being summoned for conciliation talks, the police said.
Further investigation was underway in the matter, the police added.
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