William Walter Brown was 20 and lived in Vallejo, California. He was shot and killed on January 10, 2015, one of three young victims in a series of execution-style killings that affected the city in late 2014 and early 2015.

Authorities later linked Brown’s death to a crime spree attributed to 19-year-old Lorenzo Mateo Cortez. Investigators say the spree began with the murder of 18-year-old Isaac Lopez-Reid on November 3, 2014, followed by the killing of 18-year-old Luis Perez on December 20, 2014, and culminated with Brown’s death. Cortez was arrested on March 2, 2015, while already in Solano County on unrelated felony charges, and the district attorney filed a complaint charging him in all three killings.

The case proceeded through extended legal proceedings; Cortez ultimately entered a no contest plea and received an 80 years to life state prison term that included gun enhancements. What details about William Brown’s life or last day might help fill gaps in this case for readers who knew him?