SHREVEPORT, La. â The 2 nd Circuit Court of Appeal has upheld the conviction and sentence of a Bossier City man who in 2019 killed his girlfriend and her mother. Frederick Dewayne Jackson is serving a 60-year sentence for the shooting deaths of 22-year-old Shandrell Simoneaux and her mother, 40-year-old Maiesha Simoneaux. Jackson killed Shandrell Simoneaux, his girlfriend, in front of their two children, then shot her mother. Jackson, 23, admitted to the shootings when he was arrested. He was arrested on two counts of first-degree murder. In January 2020, just before his trial, Jackson entered a plea agreement with the Bossier District Attorneyâs Office to two counts of manslaughter. He was sentenced to 30 years on each count, with the sentences to run consecutively.