The Brief Sean Grayson, the ex-Illinois deputy convicted of murdering Sonya Massey, is set to be sentenced on Thursday. Sean Grayson, the former Sangamon County sheriff’s deputy who was convicted of second-degree murder for fatally shooting Sonya Massey in 2024, is scheduled to be sentenced on Thursday. Sonya Massey and Sean Grayson | ProvidedMassey, 36, was experiencing a mental health episode and had faced mental health challenges before being fatally shot. ‘I’ll shoot you’The backstory:Early in the morning of July 6, 2024, Massey called 911 to report a suspected prowler at her home outside of Springfield. After walking outside of the home, Grayson told other officers he was "good" and that "this f***ing b***h is crazy."