A wallet on the ground in Oakland won't be yours for long.

"Oakland had the highest total crime rate of any California city with 20,000 or more people, with 8,587 total crimes per 100,000 residents."

"Stockton is one of the most dangerous cities in California. The city experiences crime twice as often as the national average and violent crimes nearly four times more than the national average. There's also high levels of gang activity, high poverty rates, and high unemployment rates in the city"