The Saratoga Springs man who admitted to killing his ex-girlfriend was sentenced on Thursday to 23 years to life in prison. Sebastian Mabb, 31, pleaded guilty in Saratoga County Court in June to second-degree murder in the death of Brianna Craig, 25, in February at her Saratoga Springs home. Craig had an order of protection barring Mabb from contacting her because of a history of domestic violence.