Alex Wong/Getty Images(WASHINGTON) — Alexander Acosta, the former U.S. attorney for the Southern District of Florida who negotiated a plea deal in 2008 with Jeffrey Epstein, arrived on Capitol Hill Friday morning to testify before the House Oversight Committee behind closed doors. Acosta resigned his position at the Labor Department after more than two years in the job amid controversy over his role in the 2008 plea deal with Epstein. “We want to know what went on during the prosecution, when many believe that Epstein was awarded a sweetheart plea deal. A lawsuit against the Justice Department, in which Epstein’s victims challenged the legality of the NPA, exposed much of the correspondence between Epstein’s lawyers and prosecutors in advance of the negotiated plea. The OPR report called it “troubling” that Acosta decided to resolve that case through a negotiated plea before the investigation was completed.