Grant McGowan, a 46-year-old man from Harvey, Illinois, was found dead in his home on July 12, 2018. Authorities classified the death as a homicide after an autopsy showed multiple gunshot wounds as the cause of death. McGowan was identified as African American.

The Harvey Police Department investigated the scene, interviewed several suspects, and collected evidence despite facing challenges including no eyewitnesses and limited forensic leads. Investigators later arrested 26-year-old Marquis Johnson and charged him with first-degree murder after Johnson reportedly confessed during police questioning, saying the shooting followed a heated argument. Johnson pleaded self-defense at trial, while the prosecution presented evidence to counter that claim.

Johnson was convicted of first-degree murder and received life imprisonment without parole. The case drew attention locally to gun violence and public safety concerns. If anyone knew Grant McGowan or has information relevant to his death, please come forward.