An indigent's equal protection rights are violated when defendants can avoid prosecution by paying a fine, without determining an individual’s ability to pay the fine.
In Bearden v. Georgia, the Supreme Court held that courts may only revoke probation and/or sentence the defendant to imprisonment if the defendant willfully refused to pay.
Petitioner’s due process rights were violated because he is entitled to a hearing before a disinterested and impartial judge in the first instance. The mayor was neither.