Marijuana killed my son: Mother reveals how son’s four-year addiction to cannabis led to massive weight loss, organ failure and death at 17 – as increase in drug’s potency sees rise in similar cases Marijuana killed my son: Mother reveals how son’s four-year addiction to cannabis led to massive weight loss, organ failure and death at 17 – as increase in drug’s potency sees rise in similar cases September 22, 2019 Brian Smith Jr. suffered from cannabinoid hyperemesis syndrome (CHS) and died at the age of 17Â CHS can arise in response to long-term cannabis use…