Hidden Secrets and Dark Lives - Apparition Intervention, #2

Brampton Lodge boarding school for boys was founded in nineteen-twenty-five. It boasts a long and impressive history, but dark and revealing secrets have been buried in the depths of its archives. They've been left in peace, undisturbed and undiscovered for almost fifty years, but the strange disappearance of the psychology teacher, who used to be a student at the school, is cause for the AI team to move in, clear the dust, and get to the bottom of where he is and why he's there.
The long departed ex-headmaster and archives manager lead Shady Shane to a pond in a local park, and that's when the investigation really begins. He finds the teacher's membership cards to gay underground BDSM sex clubs, and that leads Shane to one suspect. He connects a psychotic man, who's taken himself of his medication and still grieving his past with the teacher. The man's son is a shocked and distressed rugby player and his sister is still very handy with a hockey stick.
Then there's her gardener. Five suspects, but which one of them is guilty of dumping the teacher's dead body at the bottom of the pond?