The risk matrix: Drug-related deaths in prisons in England and Wales, 2015–2020 Posted on January 13, 2023January 13, 2023 By Becky Carter Karen Duke, Helen Gleeson, Susanne MacGregor, Betsy Thom J Comm Psych; 2023 Access article Cannabis and Cannabinoids, Chemistry, Criminal Justice System, Forensic Pathology and Medicolegal Death Investigation, Statistics and Data Analysis, Toxicology