Roadblock

Joe Peters (Charles McGraw) is a no-nonsense insurance investigator. He unwillingly gets involved with chiseler Diane Morley (Joan Dixon). Later, he's investigating suspect Kendall Webb (Lowell Gilmore) who happens to be Diane's man. He has fallen for her and willingly corrupts his morals.

The story is told in a straight and narrow fashion like Joe's initial character. His downward slide is just as straight. There is a coldness to the stiff telling. It does have a car chase through the Los Angeles river bed. I wonder if it's the first or at least one of the first. It's also quite an epic walk off to end the film.