Paul Abbate, the deputy director of the FBI who took over temporarily as acting director after the resignation of Christopher Wray, retired from his post on Monday, an FBI official said.

FBI Deputy Director Paul Abbate retired from his post minutes after President Trump was sworn into office. Mr. Abbate, who was a key member of the leadership team that critics say politicized FBI culture and investigations, quit as Mr. Trump vowed in his inaugural speech to end the “weaponization” of the Justice Department.