Reacting to the criticism, Chief Minister Pinarayi Vijayan said the government and police have always been with Jishnu's family.
The Congress-led United Democratic Front (UDF) called for a state-wide day-long hartal on Thursday to protest the police action.
Nehru College of Engineering and Research student Jishnu Prannoy's mother and kin were arrested by the police in Thiruvananthapuram when they undertook a protest in front of the office of the Director General of Police (DGP) demanding the arrest of wrongdoers responsible for Jishnu's death.
Later, he told reporters that IGP has been asked to enquire into the violent incidents and file a report by evening. She and her brother Sreejith, who is also on an indefinite fast, lashed out at the authorities for what they termed deliberate misrepresentation of facts.
Jishnu's mother is now on a hunger strike at Thiruvananthapuram Medical College hospital.
The women police personnel used force to overpower Mahija and took her to Nandavanam police camp along with other protesters, who are all expected to be let off on bail.
However, the protesters refused the demand and a lot of them were forcefully arrested by the police.
Leader of Opposition Ramesh Chennithala after meeting her said it was most unfortunate that the state government resorted to a false advertisement.
State Congress President M.M. Hassan said: "It's time the state police chief is ousted as he has failed on all counts". Behera said, "This should not have happened".
The DGP soon called for a thorough investigation. He has also refused to meet the family in the hospital, which is making a lot of people say that having a CPI government at the helm clearly doesn't stop police from committing acts of brutality.
The family, hailing from Kozhikode in north Kerala, arrived at the state capital to inquire about the inordinate delay in the probe and said they would stage a dharna outside the police headquarters if they won't get a satisfactory reply.
She was shifted to the ICU after doctors said that her health is deteriorating. "We feel that politics has taken over the strike", said Shailaja.