Former Oakland Mayor Sheng Thao, her longtime partner and two local businessmen were named in an indictment unsealed Friday alleging the four conspired to funnel city business to companies owned by the men in exchange for money and benefits to Thao and her partner.

The Duong Family owns Cal Waste Solutions, Oakland's recycling company, which also provides junk pick-up in San Jose, and an integrated waste management facility in their native Vietnam.