On the evening of December 3, 2019, 19-year-old Matthew Chamberlain was found lifeless in the roadway near 64th Street and Thunderbird Road in Phoenix, Arizona, the victim of a fatal gunshot wound. First responders pronounced him dead at the scene and detectives treated the case as a homicide tied to an illicit marijuana transaction.

Early in the investigation, 20-year-old Camden Oberndorfer provided a false, detailed account that pointed to a friend, Tyler O'Donnell, leading to O'Donnell’s arrest. Detectives later found inconsistencies in Oberndorfer’s story, determined O'Donnell was innocent, and released him. Attention then shifted to Oberndorfer and 20-year-old Francisco Gonzales. Investigators developed evidence implicating both men, and Gonzales reportedly admitted involvement. Oberndorfer and Gonzales were charged with first-degree murder, armed robbery, and violation of probation; Oberndorfer also faced charges for fabricating the false narrative that produced a wrongful arrest.

Does anyone have information about Chamberlain’s movements on December 3, 2019, or about activity near 64th Street and Thunderbird Road that evening?