Carolyn Drake/Magnum PhotosThe Vallejo city attorney’s office has long resisted public scrutiny of the police department’s frequent shootings. Detective Mustard, who between 2010 and 2019 was also Vallejo’s police union president, was a lead investigator in all of the five cases he prompted to have destroyed and was at the scene during one of them, according to a review of the case files by Open Vallejo. © Copyright 2023 Informed California FoundationOpen Vallejo is a project of the Informed California Foundation,a 501(c)(3) nonprofit organization