The Night of June 13

Elna Curry, once a concert pianist, develops an unfounded jealousy of neighbor, Trudie Morrow. Elna who suffers from neurasthenia, believes that Trudie is having an affair with her husband, John, and vows revenge on Trudie. John explains to Trudie Elna's condition and plan. Trudie, being good-hearted tells John that she'll move. One evening, John returns late from work to discover Elna dead. John burns Elna's suicide note to protect Trudie. This results in John being charged for murder and put on trial. - IMDb