A former Illinois deputy, Sean Grayson, has died in prison. He was convicted of killing Sonya Massey, a Black woman who had called 911 to report a potential break-in at her home.

Details of the incident and Grayson's conviction are known, but for further information, the source can be consulted. The circumstances surrounding Grayson's death in prison are not specified in the available information.

The source provides more details about the case and Grayson's conviction, which can be accessed for a more comprehensive understanding of the events.