An indictment was unsealed Friday as the U.S. Attorney's office announced eight federal charges against Oakland's recalled former mayor Sheng Thao, her partner Andre Jones, and two businessmen David Duong and Andy Duong,

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.

Thao has maintained her innocence and denied she is at the center of a public corruption scandal. She has largely laid low since being recalled in November.