William Scott Ritter Jr. (born July 15, 1961) is a former Marine Corps intelligence officer who served in the Soviet Union implementing arms control treaties, in the Persian Gulf during Operation Desert Storm, and in Iraq, overseeing the disarmament of weapons of mass destruction (WMD), as a United Nations weapons inspector, from 1991 to 1998. He later became a critic of United States foreign policy in the Middle East. He is a convicted child sex offender for unlawful contact with a minor, criminal use of a communications facility, corruption of minors, indecent exposure, possessing instruments of crime, criminal attempt and criminal solicitation.[1][2]

Prior to the invasion of Iraq in March 2003, Ritter stated that Iraq possessed no significant weapons of mass destruction (WMD) capabilities. According to The New York Times he became "the loudest and most credible skeptic of the Bush administration's contention that Saddam Hussein was hiding WMD." [2] Ritter resigned from the United Nations Special Commission (UNSCOM) on August 26, 1998. According to him the commission was undermined by infiltration from the CIA and lack of support from Washington and the UN Security council.[3]

Scott Ritter currently writes on issues pertaining to international security, military affairs, Russia, and the Middle East, as well as arms control and nonproliferation.
https://en.wikipedia.org/wiki/Scott_Ritter