Washington (CNN) The lawyer representing Christine Blasey Ford has sent a letter to Senate Judiciary Chairman Chuck Grassley expressing concern over the Republican's hiring of an "experienced sex crimes prosecutor" for Thursday's hearing.

Both Ford and Supreme Court nominee Brett Kavanaugh are set to appear before the Senate Judiciary Committee on Thursday for a public hearing to address Ford's accusations of sexual assault against Kavanaugh

"This is not a criminal trial for which the involvement of an experienced sex crimes prosecutor would be appropriate," the letter from Ford's lawyer, Michael Bromwich, said. "Neither Dr. Blasey Ford nor Judge Kavanaugh is on trial. The goal should be to develop the relevant facts, not try a case."

Bromwich also wrote that using outside counsel to perform questioning on the senators' behalf would go against Ford's "repeated requests through counsel that senators conduct the questioning."

"The central point is that there is no precedent for this Committee to bring in outside counsel for the sole purpose of shielding the members of the Committee from performing their responsibility to question witnesses," Bromwich said.

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