Here is the link to the PDF file that is the Drug testing policy for the Milwaukee Police Dept. It covers all of the instances where drug testing is required (even when they are promoted or have been on an extended leave) and also cover random testing. The chief determines the frequency and officers are chosen randomly.
http://city.milwaukee.gov/ImageLibrary/Groups/mpdAuthors/SOP/770-DRUGTESTING.pdf
The officer I spoke with on the phone was kind enough to email the link just for you:) A simple thank you will suffice:)
I think the police union in Milwaukee overturned it..
But if they do, that’s great because Milwaukee Police Dept has had it’s share of drug scandals.