The Reckless Moment (1949)

When a woman finds her daughter's much-older lover dead near their home, she fears her daughter was responsible and covers up the crime.  Her troubles are just beginning as, once the body is discovered, she's contacted by blackmailers in possession of love letters from her daughter to the deceased.

This is a quick-moving, desperate little movie that almost doesn't take a breath.  James Mason is particularly good as one of the bad guys who is obviously falling for the woman he's supposed to be strong-arming.

B+