In the pre-dawn hours of a Saturday in March 2020, the quiet of a Warrensburg, Missouri neighborhood was shattered by the sound of gunfire. Responding to a call just before 4:30 a.m. in the 100 block of South College Street, Warrensburg Police officers arrived to a grim scene. Inside a residence, they found 29-year-old Joseph B. Campbell suffering from several gunshot wounds to his chest.
Medical assistance was rendered, but Campbell was pronounced dead at the scene, leaving a community to grapple with the sudden and violent loss. The investigation into the fatal shooting began immediately, seeking to piece together the events that led to the tragic outcome.
The search for a suspect in Joseph Campbell's death was surprisingly brief. A short time after the shooting, 31-year-old Marvin Lewis Hill Jr. turned himself in to the authorities at the Warrensburg Police Department. His surrender brought a swift, yet unsettling, resolution to the initial phase of the investigation. Hill was subsequently booked into the Johnson County Jail. As the legal process began to unfold, it was revealed that the incident was even more distressing than initially reported; a 3-year-old child and an infant were allegedly in the room at the time of the shooting. This led to additional charges against Hill, painting a more complex and disturbing picture of the circumstances surrounding Campbell's death.
Marvin Hill Jr. faced a series of legal challenges and proceedings in the years following the shooting. He was charged with second-degree murder, armed criminal action, unlawful use of a weapon, and first-degree endangering the welfare of a child. The path to a conviction was not straightforward. A trial set for May 2022 was declared a mistrial due to an insufficient number of jurors. A subsequent retrial in August 2022 also ended in a mistrial, this time because of a hung jury. Persistence from the prosecution led to a third trial in November 2023. After four hours of deliberation, a jury found Hill guilty on all four counts.
In January 2024, justice for Joseph Campbell saw a resolution in the courtroom. Marvin Hill Jr. was sentenced to a total of 15 years in the Missouri Department of Corrections. The sentences for the various charges were set to run concurrently, with the longest being 15 years for second-degree murder and unlawful use of a weapon. An appeal was later filed on behalf of Hill, arguing for an acquittal on the child endangerment charge due to insufficient evidence and that the jury had not been properly instructed. However, in the summer of 2025, the Missouri Court of Appeals for the Western District affirmed the conviction, solidifying the outcome of the legal battle and closing a painful chapter for the family and friends of Joseph Campbell.
