Investigators tied Jonathon Jones to Jadun Byrd’s killing through a vehicle, surveillance footage, fingerprints, firearms testing and witness accounts.
ST. LOUIS, Mo. — What began with reports of gunfire in a St. Louis parking lot ultimately became a case built across cameras, a white SUV, fingerprints, a recovered firearm, cellphone activity and witnesses — evidence that ended more than four years later with a life sentence for Jonathon Xavier Jones.
Jones, 21, pleaded guilty to second-degree murder in the March 2, 2022, killing of 19-year-old Jadun Byrd and was sentenced Aug. 7 by Circuit Judge Craig K. Higgins. Law&Crime reported from court records that the life term carries the possibility of parole. Prosecutors agreed to dismiss additional weapon charges under the plea arrangement. The sentencing gave finality to a prosecution in which investigators gradually connected Jones to a Dodge Journey seen following Byrd, then supported that connection with physical, digital and testimonial evidence. Byrd was on a FaceTime call with his mother when he was shot.
The vehicle became an early focus. An eyewitness told investigators that a white Dodge Journey moved toward Byrd as he walked through a parking lot in the 2400 block of Whittier Street in The Ville neighborhood. According to the Circuit Attorney’s Office, the vehicle’s driver-side windows lowered and multiple shots were fired. Investigators then reviewed surveillance recordings from the surrounding area rather than relying only on the witness account. Prosecutors said the footage showed the same Journey circling near Byrd’s home and following the Lyft vehicle in which Byrd was riding before the shooting. The videos gave detectives a way to reconstruct movement before and after the gunfire.
Additional recordings narrowed the focus to Jones. Authorities said surveillance showed him entering the Dodge Journey about 30 minutes before Byrd was killed. Footage also showed him returning in the vehicle roughly 30 minutes after the shooting and getting out on the driver’s side. When investigators recovered the Journey, they found Jones’ fingerprints on the driver’s side, prosecutors said. That physical evidence supported what the video appeared to show and placed Jones in contact with the part of the vehicle associated with the driver. Two people who had been inside the Journey during the shooting later identified Jones as the driver and said he was one of the people who fired at Byrd.
Detectives obtained another piece of evidence after searching a residence where Jones was located. Multiple firearms were recovered there, and prosecutors said forensic testing linked one of the guns to Byrd’s killing. The publicly released material does not provide every laboratory detail behind that conclusion, but prosecutors cited the firearm testing as part of the evidence supporting the case. Investigators also examined Jones’ cellphone records. They determined that his phone had been put into airplane mode shortly before Byrd was shot and was taken out of airplane mode shortly afterward. That timing was included among the facts authorities relied on as the homicide investigation developed.
While detectives were building that technical and physical record, Byrd’s mother had experienced the shooting in a very different way. Byrd had taken a Lyft to meet her at work and was speaking with her on FaceTime during the trip, according to prosecutors. She heard gunfire and watched her son fall during the call. Leslie Byrd later recalled that after he went down, the phone’s position left her with only a limited view of what was happening around him. Her account captured a consequence that surveillance footage and forensic evidence could not: a mother remained connected to her son by video as violence unfolded around him.
Police responding to the shooting found Byrd suffering from multiple gunshot wounds. He was taken to a hospital, where he was pronounced dead, according to Law&Crime’s review of the case. His mother later said nothing appeared to have been stolen from him. Authorities have not publicly established robbery as the reason for the attack, and the prosecution materials reviewed for the sentencing do not state a confirmed motive. Rather than supply an explanation that investigators have not made public, the case record describes a sequence: Byrd left in a rideshare vehicle, the Dodge Journey followed, the SUV approached him in a parking lot and shots were fired.
The strength of the prosecution’s case did not have to be tested before a jury in the Byrd proceeding because Jones ultimately admitted guilt to second-degree murder. A plea resolves a criminal case differently from a trial: prosecutors do not have to present their evidence witness by witness and jurors do not have to decide whether the state proved the charge beyond a reasonable doubt. Here, the agreement also narrowed the final charges. Law&Crime reported that prosecutors dismissed armed criminal action and unlawful use of a weapon counts in exchange for the murder plea. The public accounts do not detail what considerations led each side to accept the agreement.
Jones was a minor when Byrd was killed. He was 17 on March 2, 2022, meaning the prosecution first had to move through Missouri’s juvenile process before the homicide charge could proceed against him as an adult. He was certified for adult prosecution on July 8, 2024. That ruling came more than two years after Byrd’s death. By then, the evidence described by police included the surveillance recordings, fingerprints from the Dodge Journey, the recovered firearm, phone activity and accounts from occupants of the vehicle. Jones’ eventual plea came after the certification placed the case in adult criminal court.
The Byrd investigation also unfolded against the backdrop of another homicide prosecution involving Jones. Months before Byrd’s death, Jones had been accused in the Sept. 6, 2021, shooting of 29-year-old Brandon Scott in downtown St. Louis. Prosecutors said that case arose from a traffic dispute near Washington Avenue and North Second Street. Jones and Mark Perry were later convicted by a jury of second-degree murder and armed criminal action. Jones received 15 years for the murder and seven years and six months for the weapons offense, to be served consecutively.
The timing created an unusual sequence in Jones’ history with the justice system. Prosecutors said he had escaped from the city’s juvenile detention center in November 2021 while facing the Scott case. Byrd was killed the following March while Jones remained outside that facility. The Scott case reached a jury verdict in 2024, while the Byrd prosecution was still pending. By September 2024, Jones had received a combined 22 1/2-year sentence for Scott’s death. Nearly two years after that sentence, he returned to court to be sentenced to life for Byrd’s killing.
That chronology also explains why the Aug. 7 sentencing represented more than the punishment for a crime recently solved. Investigators had been working from a 2022 killing; the public adult prosecution did not take shape until 2024; and Jones’ other murder case reached conviction and sentencing while the Byrd case continued. The guilty plea eliminated the need for another murder trial but did not erase the investigative work behind it. Each piece of evidence addressed a different question: cameras tracked the vehicle, fingerprints connected Jones to the driver’s side, witnesses described who was inside, firearm testing tied a recovered gun to the homicide, and phone data added a time-linked digital detail.
Circuit Attorney Gabe Gore said after Jones was sentenced that Byrd was only 19 and had his life ahead of him, adding that Byrd’s family would continue living with the loss. For investigators and prosecutors, the final court order marked the legal end of a case assembled across several forms of evidence. For Byrd’s mother, the event at the center of that evidence remains the FaceTime call in which an ordinary trip to meet her at work ended with her son being shot. Jones is now serving prison sentences tied to two separate St. Louis homicide convictions.
Author note: Last updated September 21, 2026.