Except it's not the police web site. It's an auxiliary site intended for news. Go search for "Milwaukee police" and see what the #1 hit is and what the official web site is. It's not this one.
"Official" or not, it's a public-facing website for the Milwaukee police force. What it was "intended" for, and how the public is going to see it, are two different perceptions that are clearly not aligned.
I don't see how they're clearly not aligned. As far as I can tell, you got confused because you saw a direct link that was not well labeled and didn't notice the "news" in the URL. Do you have any reason to believe that the average person who goes looking for the information you describe will find and attempt to use this site?