Crime Branch S P, P N Unni Rajan, head of the special investigation team probing Mani's death, today visited the actor's outhouse 'Padi' here, where he was found in a miserable condition before being shifted to a hospital.
He examined the evidences found at the outhouse.
"We will thoroughly examine all aspects on the issue, but we are yet to confirm whether the actor's demise was a murder or suicide. As the investigation is progressing, I cannot divulge any further details related to the case," he told reporters here after the visit.
Meanwhile, BJP state President Kummanam Rajasekharan, who visited Mani's family members today, said a CBI inquiry should be ordered, if necessary, to end the mystery over the death.
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Criticising state police, he said police had "failed to make any breakthrough" in the case even after several days of the incident.
Police had intensified the investigation after the chemical examination report by the Regional Chemical Examiner's Laboratory in Kochi showed presence of chlorpyrifos, a highly poisonous insecticide, in Mani's viscera samples.
Police had also taken into custody four aides of the actor for detailed interrogation.
Mani's family members including his wife Nimmi and brother RLV Ramakrishnan voiced suspicion about the involvement of the his friends and aides in his mysterious death.
45-year-old Mani, who had carved a niche for himself in the Malayalam and Tamil film industry, was undergoing treatment for liver and kidney diseases at Amrita Institute of Medical Sciences for some time when he died on March 6.
Police had registered a case of unnatural death after AIIMS doctors said that traces of methyl alcohol were found in his blood.