Yamakinkarudu (1982)

Chiranjeevi and Sarathbabu are police officers and very close friends as well. Both of them send a very notorious criminal gang (headed by Sudharshan)to jail. Chiru later marries Sarathbabu's sister - Raadhika and the couple also have a son. In the meantime the criminal gang escapes from jail and are trying to take revenge on both the officers. First they kill Sarathbabu and later Satyanarayana - a retired army officer - who is taking care of Raadhika and her son while Chiranjeeevi is away. They also kidnap his son and ask him to come to a place to retrieve his son.