Archive · 24 Aug 2026
Former Illinois Deputy Dies Serving Sentence for Sonya Massey Killing
Sean Grayson was a former police deputy in Illinois.
He went to Sonya Massey’s home after she called 911 about a possible prowler.
During the visit, he shot Massey three times.
The shooting was recorded by a body camera and caused protests.
A jury found Grayson guilty of second-degree murder.
He received a 20-year prison sentence.
Grayson had colon cancer and asked to leave prison early for medical reasons, but that request was denied.
He later died, and officials have not said what caused his death.
Sean Grayson, a former Sangamon County sheriff’s deputy, died Sunday while serving a 20-year sentence.
Grayson was convicted of second-degree murder for shooting Sonya Massey during a July 2024 911 response.
Body-camera footage showed Grayson firing three shots after Massey apologized and ducked behind a kitchen counter.
The shooting prompted protests, national attention and changes to Illinois police hiring and training requirements.
Grayson’s request for medical release was denied, but officials have not said whether colon cancer caused his death.
- Who
- Former Sangamon County sheriff’s deputy Sean Grayson and Sonya Massey, whom Grayson was convicted of killing.
- What
- Grayson died while serving a 20-year sentence for second-degree murder in Massey’s shooting.
- When
- Grayson died around noon on Sunday; Massey was shot on July 6, 2024. The reports do not provide a calendar date for Grayson’s death.
- Where
- Massey was shot inside her Springfield-area, Illinois, home. The location of Grayson’s death was not disclosed.
- Why
- The shooting followed Massey’s 911 call about a possible prowler; the cause of Grayson’s death remains unclear.
Prosecution and accountability arguments
Grayson’s defense and medical-release arguments
Whether Grayson posed an immediate threat
Prosecution and accountability arguments
Prosecutors said Grayson threatened Massey, fired three shots after she apologized and ducked down, and declined to provide medical care. The other responding deputy testified that he did not consider Massey a threat.
Grayson’s defense and medical-release arguments
Grayson argued that he feared Massey would throw a pot of boiling or hot water at him after she picked it up from the stove.
Whether medical release was appropriate
Prosecution and accountability arguments
State’s Attorney John Milhiser argued that Grayson’s medical condition had already been considered at sentencing and that releasing him would be a miscarriage of justice and an insult to Massey’s family.
Grayson’s defense and medical-release arguments
Grayson sought early release under Illinois law after being diagnosed with serious colon cancer, roughly six months into his sentence.
Broader policing concerns
Prosecution and accountability arguments
Massey’s killing prompted protests, a Justice Department civil-rights investigation and demands for closer scrutiny of police use of force and officer hiring histories.
Grayson’s defense and medical-release arguments
The case and subsequent agreement focused on changes including additional training for interactions with people with behavioral-health disabilities and a mobile crisis-response program.
- Victim
- Sonya Massey, 36
- Former deputy
- Sean Grayson, 32 at the time of his death according to one report
- Conviction
- Second-degree murder
- Sentence
- 20 years in prison, the maximum sentence
- Shooting
- July 6, 2024, during a 911 response
- Medical condition
- Stage 3 colon cancer, reportedly diagnosed before Massey’s killing and later described as having spread to his liver and lungs
- Medical release
- Denied unanimously by the three-member Illinois Prisoner Review Board in July
- Conviction-year discrepancy
- One supplied account says Grayson was convicted in October 2025, while the existing summary identifies 2024; the other article says only that the conviction occurred in October
