Grayson is serving a 20-year prison sentence after being convicted of second-degree murder in the 2024 fatal shooting of Sonya Massey. The former Sangamon County sheriff's deputy serving a 20-year prison sentence for the fatal shooting of Sonya Massey has been denied medical release by the Illinois Prisoner Review Board. Sean Grayson denied medical release requestA spokesperson for the Illinois Prisoner Review Board confirmed Friday that a three-member panel voted unanimously, 3-0, to deny Sean Grayson's petition for medical release. Sean Grayson and Sonya Massey | ProvidedAt his sentencing, Grayson apologized to Massey's family. Sean Grayson was convicted of second-degree murder in the senseless killing of Sonya Massey, and his sentence must stand.