The 43-year-old, of Primity Terrace, New Buildings, Derry, was handed a sentence of five years – half to be served in custody and half on licence – having previously been found not guilty of murder but guilty of manslaughter.
46-year-old Darren McNally died from a knife wound sustained at Shauna Pyper’s home June 8, 2020.
Detective Inspector Claire McGarvey said: “Throughout a two-week trial, the court heard of the prolonged domestic abuse and violence, and alcohol abuse, which had occurred within the relationship.
“This is a tragic case, which has ended with a life taken, and a family left bereft.
Detective Inspector McGarvey added: “Domestic abuse is not just physical. It can take many forms, including controlling behaviours and emotional abuse.
“We also sadly know that, as in this case, domestic abuse can fatally escalate.
“I am keen to encourage any victims of abuse to come forward. We will help you.
“We’ll listen to you and we will treat you with total respect and sensitivity. You don’t have to suffer in silence.
“Please contact us on 101, or in an emergency call 999.”