Mahottari: The police today freed four persons, who were detained on the charge of unfair conduct during the ongoing SLC examination. They were freed after a written agreement. According to District Police Office Mahottari, Sanjibkumar Mishra, Shivu Mandal and Chandan Jha were arrested from the premises of Lachamu High School, while Surendra Sahani was held from the Bhakharibhat Higher Secondary examination centre. DSP Sanjayaraj Sharma said police had detained four youths while they were passing cheats. But, they were released after a written commitment that they will not repeat such misconduct again.