Again Kasargod Khader Bhai

A group of mimicry artists are 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?