After 33 years and numerous unsuccessful parole petitions, Leopold was released in March 1958.[1][2] In April he attempted to set up the Leopold Foundation, to be funded by royalties from Life Plus 99 Years, "to aid emotionally disturbed, retarded, or delinquent youths".[7][8][64] The State of Illinois voided his charter, however, on grounds that it violated the terms of his parole.[65]