Three Years Dark is the 38th in the Turn Of Fate television short movies and is from 1958 (top right image).
Starring Barbara Stanwyck as Midge Varney and Gerald Mohr as Jason Nichols.
Nichols killed Varney’s husband and everyone is very unhappy when the two get together.
However, she’s just setting him up and the arrival of the police is perfect timing as they kill him.
She gets revenge without even pulling the trigger.
Movie pages here.