PLEASE MURDER ME!(1956)
In the set: 100 Greatest Mystery Classics

With actors from two of my all-time favorite
TV shows, Raymond Burr(Perry Mason) & Angela
Lansbury(Murder She Wrote), this was a sure
fire winner! And it is a good movie! Perry, er,
I mean Raymond, plays a lawyer who's having an
affair with Angela who's married! Her husband
comes home after finding out about their trist
and he goes into her room and slams the door!
He winds up dead and Perry, um, Raymond, defends
her succesfully! But things take an unexpected
turn, and things go terribly wrong for the two! B+

A review from IMDb.com:

This excellent thriller is one, if not the only,
starring role for Raymond Burr in the movies, one
year before he became Perry Mason on TV. Here he
is a lawyer too, who brings out the acquittal
of his client (Angela Lansbury)accused of murder,
only to discover after the verdict, that she
really is guilty as hell. Obsessed with his love
of Justice, he devises a clever plan to by-pass
the double jeopardy immunity, and arranges for
her to be caught red-handed after committing
another murder... with him as the victim! - IAGO-16