My best friend at secondary school was abducted and never seen again. She vanished in a spell that cannot have been more than 3 minutes because that it how long it took to walk between our houses. I remember that the parents were (strongly) suspected but nothing was ever proved.
The young couple who purchased the house next door to us had lived there for less than 2 weeks before a removal van arrived to move them out again.
Dave M had worked in the dept for 3+ years but then took a new job in Liverpool. He gave all of us a new but false address and a fictitious phone number.