(Hillsboro, OR) -- Prosecutors are seeking a harsher sentence for the man accused in the brutal murder of a Beaverton nurse. KATU-2 reports prosecutors want to enhance the potential sentence for 27-year-old Bryce Schubert, saying he was "deliberately cruel" to his victim, 32-year-old Melissa Jubane. Schubert pleaded not guilty last week to charges of first-degree murder, first-degree kidnapping and second-degree abuse of a corpse. Schubert had previously pleaded not guilty to second-degree murder, but a grand jury upgraded the charges last month. Police found Jubane's body several days after she was reported missing on September 4th after she failed to show up for work. Investigators say Shubert lived across the hall from Jubane in their apartment complex in Beaverton.