Apparently infuriated with his in-laws for not meeting his dowry demands, the accused, Sanjay Yadav, pushed his wife Dulari Devi (22) and son Anand Kumar (10 months) into a well at his wife's parental home under Chandramandi police station, the sources said.
The mother-son duo drowned in the well from where their bodies were later recovered and sent for post-mortem.
The deceased woman's brother Pardeshi Yadav has lodged a named FIR against his brother-in-law and his parents charging them with the murder of his sister and nephew for greed of dowry, the sources said, adding that Sanjay is absconding.