A jilted woman lied to police that her ex had threatened to kill her.
Samantha Marsden, aged 25, and Darren Cooper had been planning to marry but he called the wedding off.
Marsden then embarked on what a judge called a campaign of ‘wicked, false complaints’ about him, Sheffield Crown Court heard.
It ended with Mr Cooper being arrested and interviewed on three occasions.
Marsden, of West Pinfold, Royston, Barnsley, was jailed for 12 months after admitted perverting the course of justice.
She falsely claimed that her ex had been harassing her and claimed he had sent a series texts in which he threatened to kill her.
Police investigations revealed that Marsden had sent the texts to herself.
Officers found notepads at her home with drafts of the texts and ‘practice runs’ of threats supposedly made in letters.
Jailing her, Judge Peter Kelson said: “It is hard to understand your spite and vitriol that you stooped so low as to make these false allegations against Mr Cooper as a means of causing him pain and suffering.
“Mr Cooper was completely innocent. It can’t be understated how terrifying it was for him.”