No dog no death in this case, the dog is the direct cause.
http://www.dogbitelaw.com/PAGES/statistics.html
Maybe its time to outlaw dogs. Thats far more deaths than marajuana has ever directly caused.
This might seem obvious to all but the difference between murder and marajuana use is one always involves the death of somebody against their will the other doesn't. One can be done responsibly without injury to anybody, the other is by defination killing a person. If you need these differences spelt out the education system has failed you.