It was made in '81 and is actually a pretty solid police film. It's not great, it's not Chinatown, but it also is pretty far from horrible.
The dialogue is absolutely fantastic, and even in the throw away moments, there is a humor that seems very human. It's Hollywood sharp and witty to the point where it's almost too good to be realistic, it's just, human. There are a lot of little throw away conversations that seem like the kind of thing you'd hear in your everyday life.
And that adds a nice touch of realism to what is otherwise a cop film, and those are always pretty unrealistic.