Anthony McRae fatally shot three and injured five before killing himself; THC was found in his body.

Salvador Ramos killed 21 and had conflict with family who restricted his marijuana use.

Lyndon McLeod killed five and reportedly earned money through growing marijuana.

Ethan Crumbly killed four classmates; witnesses reported marijuana use in his home.

Darrell Brooks killed six with his vehicle and smelled of marijuana when caught.

Jacob Bergquist, who killed two, had a previous conviction for marijuana possession.

Tristan Griffin killed three people and himself; autopsy revealed THC in his system.

Connor Betts, who killed nine, had long-term marijuana and polysubstance abuse history.

DeWayne Craddock fatally shot 12 after being seen smoking marijuana outside his apartment.

Devon Erickson and Alec McKinney killed one and injured eight; both had histories of marijuana and other drug use.