Richburg admitted in his plea, however, that he skimmed some of the department funds that he paid the unidentified informant. The investigation began when the FBI received information that Richburg was selling stolen property. Agents later used a source to purchase goods from Richburg, including iPads and iPhones.
As Richburg conspired with the informant, the two discussed plans to set up innocent people. In one recorded phone call in September 2012, Richburg directed the informant to plant a gun in the vehicle of an unlicensed cabdriver, known as a "hack," so that Richburg could arrest him on a firearms violation, according to court records. Prosecutors said the plot was not carried out.
"You get in a hack and drop the burner in the hack," Richburg was recorded saying, according to his plea agreement. "Get a hack for three blocks. Drop it. We got to think outside the box to get this done."