"A Lovely Way to Die" is a workmanlike version of a very old plot. See if you recognize it: Young wife is accused of murdering rich old husband, hires wisecracking lawyer, who hires tough cop as bodyguard.
The structure of such movies is predictable. You alternate three kinds of scenes until the movie is over.
Scene A involves cynical fast talk between the lawyer and the cop. Scene B involves a flirtation between the cop and the girl. Scene C involves the hero involved in violence, eventually leading to the rescue of the heroine and a final triumphant embrace.