LOCKPORT, N.Y. (WIVB) — A North Tonawanda woman, convicted of stabbing her boyfriend to death, is now a free woman.

Jennifer Marchant was released from the Niagara County Jail on Wednesday morning after being sentenced to 12 years in prison.

She spent the past four years behind bars, charged with manslaughter in the death of her boyfriend, Ralph Stone.

She has maintained that she was trying to defend herself.

Appellate judges decided last week that the jury’s verdict was wrong.

They say Marchant should have never been convicted based on the evidence.

Niagara County District Attorney Caroline Wojtaszek said “The people have 30 days to decide whether or not to make application to the Court of Appeals.”