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Dennis Herrera issued the subpoenas on Wednesday for records from eight companies and nonprofits that his office believes were involved in funneling donations to fund city programs and events, including funding for Public Works holiday parties.
The subpoenas are being served on PG&E, construction firms Webcor, Pankow and Clark Construction, recycling company Recology and three nonprofits -- Lefty O'Doul's Foundation for Kids, the SF Parks Alliance and the SF Clean City Coalition.
"We're following the facts, and we're following the money," Herrera said. "We are going to follow the evidence wherever it leads. We will get to the bottom of this. San Franciscans deserve no less."
Stay with ABC7 News for updates on this developing story.