It was Peter Yarrow - more info at http://en.wikipedia.org/wiki/Peter_Yarrow
While campaigning for 1968 presidential candidate Eugene McCarthy, Yarrow met McCarthy's niece, Mary Beth McCarthy, in Wisconsin. They were married in October 1969.
In 1970, Yarrow was convicted of, and served three months in prison for, taking “improper liberties” with a 14-year-old fan. He has since apologized for the incident: “In that time, it was common practice, unfortunately –– the whole groupie thing.” President Carter later granted him clemency for the incident.
Maybe The Øne can make Yarrow the new... 
Composer of Music to Abuse Children Czar