BJP OBC Leader Ranjith Sreenivasan was murdered at his residence in Alappuzha.
The police arrested workers of the Social Democratic Party of India (SDPI) in connection with the murder.
Mavelikkara Additional Session court sentenced all the accused to death.
As per investigation, first eight accused were directly involved in the murder.
Alappuzha DYSP NR Jayaraj conducted a thorough investigation and filed a chargesheet for the case