This is a movie with a nice story, but I've never seen De Niro's wonderful acting totally wasted as in this movie; his performance is good, if he acts to render a shy, dumb, introvert cop/detective that is somewhat involved in a small-mafia situation, but , to be honest, people want to see him cool, outgoing, self-confident..
It's not the role for him, definitely.
Bill Murray fits a little bit better, but it appears unpleasant, most of the time ...
Uma Thurman has the best character, and as a whole, I'd say that the movie is worth a view, but it will seldom make you laugh ...