A Stafford County teenager’s 48-year prison sentence for killing her mother will stand. The judge in the case Monday denied a motion from attorneys for Ashleigh Nicole Dye to present new evidence in hopes of getting a lesser sentence. The 18-year-old was sentenced in June after pleading guilty to first-degree murder and using a firearm in a felony. According to the Associated Press, Dye was a few months shy of 18 when she shot and stabbed 62-year-old Brenda Dye at the family home in July 2011. She told police her mother was standing between her and her boyfriend. Dye’s boyfriend, Eddie Chewning was convicted of being an accessory; his sentencing is set for Sept. 20.