Police have detained a school classmate of accused Chetan Chaudhary in Ketan Agarwal's murder case, reports said. The classmate allegedly told investigators that Ketan's fiancée, Siya Goyal, and her lover, Chetan, had discussed killing Ketan before he was pushed to his death from Pune's Lohagad Fort. Police also traced digital evidence linking the classmate to Chetan after incident, reports added.