On the evening of July 23, 2023, at about 10 p.m., Stockton police responded to reports of a shooting near Sierra Nevada and Oak streets and found 34-year-old Guy Z. Zielske with gunshot wounds. He was taken to a local hospital and died of his injuries. Authorities initially released few details about suspects or the circumstances of the shooting, and the case remained unsolved for months.

On April 23, 2024, Livermore police stopped a vehicle and arrested 38-year-old Bradley Vargas on a Stockton arrest warrant naming him as a suspect in Zielske’s killing; Vargas was booked into the San Joaquin County Jail. Motive and the relationship, if any, between Zielske and Vargas have not been disclosed and the investigation is ongoing.

Did anyone in Stockton know Zielske or see anything in the neighborhood that night?