This is a typical film noir of the period and , in my opinion, this is no bad thing. It follows all the typical patterns of a hundred other B-movies of a similar type of it's day. Shadowy photography, good man laid low by the femme fatale, a few seedy gangsters thrown in, all the ingredients are there. If you're not a big fan of noir then you might switch off after 30 minutes exclaiming that "I've seen it all before", and you'd be right. Personally I love the genre and thought this was a competently made movie with good performances by the leading actors. McGraw is perfect as the law-abiding detective seduced into lawlessness by the siren of the piece (Dixon).
If you like film noir check ROADBLOCK out. If you don't then maybe this movie's not for you.