The case of the cautious coquette

This review refers to "The Case of the Cautious Coquette" only. While representing a badly-injured young hit and run victim, Perry Mason and his PI, Paul Drake, are offered a crucial piece of evidence, one that almost guarantees a generous settlement for their client. Too bad it turns out to be bait for a trap devised by a clever but desperate murderer. Mason finds himself up to his neck in a case involving a much-married blonde, a vindictive ex-husband, and a homicide cop who would give his right arm to put a certain lawyer behind bars.