Matthew Graves, a compliance and litigation partner at DLA Piper, was confirmed by the U.S. Senate on Thursday to lead the federal prosecutor’s office in Washington, D.C., a role in which he will oversee cases related to the Jan. 6 Capitol riot.

Graves was confirmed as U.S. attorney by a voice vote Thursday evening. His nomination had reportedly been held up by Sen. Ron Johnson, R-Wisconsin, who was seeking answers to questions he sent to the U.S. Justice Department about Jan. 6 cases.