After failing to criminally prosecute any of the financial firms responsible for the market collapse in 2008, former Attorney General Eric Holder is returning to Covington & Burling, a corporate law firm known for serving Wall Street clients.

The move completes one of the more troubling trips through the revolving door for a cabinet secretary. Holder worked at Covington from 2001 right up to being sworn in as attorney general in Feburary 2009. And Covington literally kept an office empty for him, awaiting his return.

The Covington & Burling client list has included four of the largest banks, including Bank of America, Citigroup, JPMorgan Chase and Wells Fargo. Lobbying records show that Wells Fargo is still a client of Covington. Covington recently represented Citigroup over a civil lawsuit relating to the bank’s role in Libor manipulation.

Covington was also deeply involved with a company known as MERS, which was later responsible for falsifying mortgage documents on an industrial scale. “Court records show that Covington, in the late 1990s, provided legal opinion letters needed to create MERS on behalf of Fannie Mae, Freddie Mac, Bank of America, JPMorgan Chase and several other large banks,” according to an investigation by Reuters.

The Department of Justice under Holder not only failed to pursue criminal prosecutions of the banks responsible for the mortage meltdown, but in fact de-prioritized investigations of mortgage fraud, making it the “lowest-ranked criminal threat,” according to an inspector general report.

Read the full article at The Intercept.