Murlaleedharan, who had given a letter to Chief Minister Oommen Chandy last week seeking action against the three police officials as recommended by CBI while closing the spy case, said if the government failed to act on his demand, he would seek legal option.
"I will go to any extent to prove the innocence of my father. The Government could either accept or reject the demand made in my letter. If the demand is rejected, then I would take legal steps," Muraleedharan told reporters.
A former KPCC president and MLA from the state capital, Muraleedharan said he did not think action against the three police officers would harm the party or the government. At the same time, he said, he was ready to withdraw his demand if the party or government thought it would do any damage to them.
Referring to attempts by certain quarters to drag Defence Minister A K Antony into the controversy since he had replaced Karunakaran as Chief Minister, Muraleedharan said he did not want to drag Antony's name in connection with the case.
The spy case has been in back in limelight after the Kerala High Court ordered the government to pay Rs 10 lakh as compensation to space scientist Nambi Narayanan, who was one of the accused in the case.
A week later, Muraleedharan added a further dimension to the issue alleging that former Prime Minister P V Narasimha Rao could have a role in the "political conspiracy" linked to the case, which led to the outster of Karunakaran as Chief Minister in mid-1990s.
He also gave a letter to Chandy asking the government to initiate action against the three police officials, one of them an IPS officer who later became the Chief Information Commissioner in the state, as recommended by the CBI for "unprofessional conduct of investigation."
He also criticised the present UDF Government's decision to not to proceed against the police officers after coming to power last year.
