A former deputy has died while serving a prison sentence. Sean Grayson was convicted of killing Sonya Massey and was given a 20-year sentence. He died in prison, although details of his death are not provided here.

Further information about the case and Grayson's death can be found through the source. The circumstances of his conviction and imprisonment are known, but specifics about his time in prison and the events surrounding his death are not included in this brief summary.

The source provides more details about Sean Grayson and his case, including his conviction and sentencing for the killing of Sonya Massey.