Sean Grayson died in prison while serving 20 years for Sonya Massey’s killing. Here's what we know about his cause of death.

Sean Grayson, the former Sangamon County Sheriff's deputy convicted of murdering Sonya Massey in her home in 2024, died on Aug. 23, his lawyer said.

Grayson, 32, was found guilty last October of second-degree murder for the shooting of Sonya Massey and was serving a 20-year sentence.

Former Sangamon County sheriff's deputy Sean Grayson has died in prison. He was serving a 20-year sentence for the murder of Sonya Massey. Grayson's request for medical release…