Authorities in Contra Costa County have taken a Pittsburg man into custody following a significant discovery of illegal firearms at his residence. According to a social media post by the Contra Costa Sheriff’s Office, detectives served a search warrant on Thursday, in connection with a shooting at the Contra Costa County Fairground in Antioch on September 16, 2024. The search led to the arrest of 27-year-old Diego Vasquez-Gomez, whom detectives believe to have been manufacturing and unlawfully distributing weapons, including assault types.