Illinois’ top court has rejected a challenge to the state’s policy of continued incarceration for parolees who can’t find or afford suitable housing. In a 12-page decision authored by Justice Robert R. Thomas, the Illinois Supreme Court said the petitioner did not prove he deserved mandamus relief from custody. Johnny Cordrey, who was sentenced to prison for sexual assault in 1993 and became eligible for parole last year, challenged the policy — known as “violating at the door&rdquo …