![](https://cannabis.net/drive/1000/3743_bm5E_thccaraccidentsdoubled.jpg?width=200&height=200)
Prevalence only means that the person involved in the fatal accident had consumed cannabis or a cannabis related product within the past 30-90 days. In most cases, within a month. However, this doesn’t mean that the person died because they smoked marijuana and drove. It only means that at “some point” during these past 90-days they consumed cannabis.