Dabholkar (67), an anti-superstition crusader, was shot dead while on a morning walk on Omkareshwar Bridge here on August 20, 2013.
Hamid Dabholkar, son of the slain rationalist thinker and founder of Maharastra Andhshradha Nirmulan Samiti, said there is a "striking similarity" between the three murders.
'A message was sent to society that those who question dogmas and believe in scientific methods will be silenced.' Hamid Dabholkar tells Neeta Kolhatkar why he is disappointed that his father Narendra Dabholkar's killers have not been arrested yet.
'If timely action was taken by the CBI, the other three murders could have been prevented.'
The Prevention and Eradication of Human Sacrifice and other evil and Aghori practices Act, which faced immense opposition for over seven years, was passed in the Maharashtra State Vidhan Sabha (lower house) on Friday.
Though the list of superstitious beliefs is long, often dissolving distinctions of class, caste, religion and education, Karnataka's anti-superstition bill is seen as a big step ahead.