Navsari local crime branch (LCB) cracked the seven-month-old mystery of missing history-sheeter Bhautik alias Bhavu Koli Patel (29) whose body was recovered from a pit near Amalsad-Bilimora railway track on April 7. Police arrested six people for the murder, which was a revenge killing plotted by history-sheeter Kalpesh Patel. Bhautik was out on bail in a previous case when he was murdered.