A former Illinois deputy has died while serving a prison sentence. Sean Grayson was convicted of killing Sonya Massey and was given a 20-year sentence.

Details of his death are not provided here, but the source has more information on the circumstances. Grayson's conviction was for the killing of Sonya Massey, and he was serving his sentence at the time of his death.

Further details on Sean Grayson's death can be found through the source publication. The available information confirms his conviction and the length of his prison sentence, but does not elaborate on the events surrounding his death.