Through and Through (1973)

Based on a pre-war murder case of the Malisz couple. They end up committing a petty robbery and a sordid murder. He is an illustrator who is not used by a climbing architect. His folks don't like his wife and keeping both of them around as they float from one petty job to another. They finally try to rob a mailman of a bogus money order they have cooked up and end up killing an old, invalid couple with whom they have roomed.