Nottingham attacks: Police contact with triple killer to be investigated - bbc.co.uk
- Nottingham attacks: Police contact with triple killer to be investigated bbc.co.uk
- Nottinghamshire Police placed under investigation by watchdog over prior contact with triple killer Valdo Calo Daily Mail
- Valdo Calocane cops face probe by watchdog over contact with killer before rampage The Mirror
- Watchdog investigates Nottinghamshire Police over contact with killer Valdo Calocane The Independent
- Nottingham attack witness experiences nightmares after 'callous and calm' Calocane murders The Telegraph