The body of Rampal (55) was found in his house yesterday. His sons Anil (23), Kuldeep (20) and a daughter Priyanka (16) are absconding after the incident, said SSP Vijay Yadav.
Police suspect it to be a revenge killing by the children of the victim. Rampal had allegedly murdered his wife in 2008.
A case has been registered and investigations are on, said the police.