Massive snow falls and a severe cold front, and the carjack rate is only affected by 20%
I am thinking this problem is far worse than you know.
I have an idea, keep the criminals in jail until trial and watch the rate drop a hell of a lot more. Perhaps actually prosecute the criminals for their actions and see what happens.
https://cwbchicago.com/2021/02/snow-job-cpd-top-cop-boasts-carjackings-down-20-in-february-doesnt-mention-blizzards.html