A warrant to arrest a violent schizophrenic man before he killed three people in Nottingham was not executed by police for months before the attacks in what was described as a “serious, systemic, operational failure”, an inquiry has heard.
Valdo Calocane killed University of Nottingham students Barnaby Webber and Grace O’Malley-Kumar, both 19, and caretaker Ian Coates, 65, and attempted to kill three more people in June 2023.
