The deceased, in this case, one Thiripurasundari, is the second wife of P.W.1. The accused is the sister's son of the deceased. The deceased used to help the accused, financially. The deceased and P.W.1 did not have any issue and therefore they adopted a male child, namely, Karthick. Since the deceased adopted the child, the accused had grievance that instead of giving properties to him, the deceased may settle the same in favour of her adopted son. On 04.06.2012, when P.W.1 was about to go to school to give lunch for their adopted son, there was a quarrel between the accused and the deceased. P.W.1 compromised them and thereafter went to the school. When he was returning back, he heard some noise from inside the house and found the house was locked from inside. Hence, with the help of P.Ws.2, 3 and 4, P.W.1 broke open the door and at that time, he found the accused attacking the deceased with a knife and on seeing them, the accused threatened them and ran away. Immediately, P.W.1 went to the police station and lodged a complaint, Ex.P.1.