Mercedes Vega was a 22-year-old woman from Tempe, Arizona. On the night of April 16, 2023, surveillance video recorded her entering the parking garage at her apartment complex before she was due to meet friends. Investigators allege that she was assaulted and abducted there. Her car was later found elsewhere in Tempe, and she was found dead the next morning in a vehicle near Tonopah.
Sencere Hayes, Cudjoe Young, and Jared Demarcus Gray have been charged with first-degree murder and related offenses. Prosecutors allege that Vega was killed to prevent her from testifying in a separate robbery prosecution. Those assertions remain allegations: all three defendants have pleaded not guilty to the homicide charges, and none has been convicted of killing Vega. Current ABC15 reporting says the murder case is set for trial in 2027, a future setting that requires a docket refresh before publication.
Young's legal history must be kept separate from the pending murder case. In May 2026, a jury convicted him of armed robbery and attempted armed robbery arising from 2020 incidents involving Vega and a coworker. That verdict adjudicated the older robbery offenses only; it did not determine any defendant's guilt in Vega's death.
The case remains ongoing. This account avoids unnecessary medical and scene detail and attributes the alleged motive and participation to prosecutors or charging records. An official Maricopa County docket or operative filing should be added at the publication desk to confirm the three defendants' current charges and the 2027 setting.