There are 0 recorded deaths from marijuana ever. You would need to consume 15 Thousand joints in something like 20 mins to get to a lethal dosage. There have been no violent crimes committed by anyone under the influence of marijuana. Marijuana does not cause brain damage, or any other medical illnesses. If anyone tells you otherwise ask for proof. And they will not be able to show you this proof as it does not exist. And if they do show you so called proof. Ask for how the experiment was conducted and for who conducted it, who funded it, and most probably these questions will invalidate the whole experiment.