Again Kasarkode Khaderbai

Plot: A group of mimicry artists is suspected when the son of an old nemesis is found murdered. A mimicry group called Kaladarshana are invited to perform in a jail. Incidentally, Kasim, the son of their old nemesis, Khader Bhai, is in the same jail. When Kasim is found murdered, the needle of suspicion points towards the group. Who is the real killer?