One Day a Lemming Will Fly, Pt. 1

S1 E6: A 14-year-old boy, Tim, is found hanging from a tree--murder or suicide? Fitz find out from the boy's brother that Tim was gay and with the main suspect being Tim's teacher, Cassidy, DS Beck and Fitz embark on extracating a confession. But is it real or are they just responding to the demands of DCI Bilborough and the public?