The decline in the number of marijuana seizures by U.S. officers along the Mexico border from 2011 to 2014. States' decriminalization of marijuana is leading Mexican cartels to shift to heroin and methamphetamine production.
The decline in the number of marijuana seizures by U.S. officers along the Mexico border from 2011 to 2014. States' decriminalization of marijuana is leading Mexican cartels to shift to heroin and methamphetamine production.
