https://www.sciencedirect.com/science/article/pii/S0955395923002025

"Changes in arrests following decriminalization of low-level drug possession in Oregon and Washington"

"We obtained arrest data for 2019 to 2021 for intervention states (Oregon and Washington) and control states (Colorado, Idaho, Montana, and Nevada). We calculated monthly rates for arrests overall and for violent crimes, drug possession, equipment possession, non-drug crimes, and a set of low-level crimes termed displaced arrests."

"There were no significant changes in overall arrests, non-drug arrests or arrests for violent crime in either state, relative to controls."