Mohammed Mubarak (28), who was on the run for the last one year, was arrested from a place near Pollachi in the district last night, they added.
According to the police, as a hunt was on for two-three persons for their alleged involvement in the killing, the Special Investigation Division of the CB-CID had received a tip-off, following which Mubarak was arrested.
Four persons were earlier arrested in connection with the killing of C Sasikumar, who was hacked to death on the night of September 22 last year by two bike-borne assailants.
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