If you haven't yet gotten yours you can stop by either Tires Tires Tires location in Sioux City to pick up your I Support Law Enforcement t-shirt for a donation of $20. The t-shirts should be available for the next couple weeks at either location.
According to an article from KSCJ proceeds will be divided between the Sioux City Police and Woodbury County Deputies Association.
http://kscj.com/2016/07/22/tires-tires-tires-begins-campaign-support-local-law-enforcement/