IN-DEPTH: Quadruple Murder Case Warning to ‘Those Who Peddle Myth’ Cannabis Is Not Dangerous

Published on March 1, 2024

LONDON—A prolific user of cannabis who stabbed to death his girlfriend, her mother, her grandmother, and the grandmother’s partner in a horrific night of violence at their home in south London has been jailed for a minimum of 46 years. Sentencing 29-year-old Joshua Jacques, Mr. Justice Bryan said: “The tragedy that played out on the night of 25 April 2022 is a salutary lesson to all those who peddle the myth that cannabis is not a dangerous drug. It is and … the potential to cause psychosis is well established.” The case highlights a link between cannabis and psychosis, which can in rare instances lead to horrific violence....