John Conyers stepping aside as ranking Dem on House Judiciary Committee

The Hill reports:

Rep. John Conyers Jr. (D-Mich.) announced he is stepping aside as the ranking member of the House Judiciary Committee pending an investigation into allegations of sexual harassment.

“After careful consideration and in light of the attention drawn by recent allegations made against me, I have notified the Democratic Leader of my request to step aside as Ranking Member of the House Judiciary Committee during the investigation of these matters," he said in a statement on Sunday.

If he did nothing wrong why is he stepping down as ranking Democrat on the House Judiciary Committee?