The New York Post said Andreia Schwartz, who pleaded guilty in January to state drug and prostitution charges, once worked for Emperors Club VIP, the escort service that allegedly supplied Gov. Eliot Spitzer with his $4,300-a-night call girl "Kristen."

Schwartz later became a "confidential source" for federal authorities investigating Spitzer, who tendered his resignation effective Monday, The Post's sources said.

She was quietly brought, in handcuffs and shackles, to the Brazilian consulate Wednesday to fill out deportation paperwork.

She reportedly left for home Wednesday night after Spitzer announced his resignation.