Biju was hacked to death at Payyanur town in Kannur, which has witnessed a series of clashes between ruling CPI(M) and the RSS for the past one year.
He was an accused in a case relating to the killing of a CPI(M) worker in 2016.
He was out on bail when he was killed.
The CPI(M) had rejected Rajasekharan's charge and alleged that the BJP leader was trying to add fuel to fire.
Yesterday, Chief Minister Pinarayi Vijayan had stated in the assembly that the government would register a case against Rajasekharan after examining the video and also that the BJP leader's claim was incorrect and illegal.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)