In Florida, a person can seal or expunge criminal records but only once in a lifetime and only if the charge(s) qualifies. Not all charges can be sealed or expunged. The Petition to Expunge or Seal must be filed in the county where the case originated. In Florida, expunging a case or sealing an arrest or case are different things.
Recently the 5th District Court of Appeal held that a passenger of a vehicle is lawfully seized and not free to leave a traffic stop. Therefore, if evidence of a crime is found, it can be used against the passenger. A large amount of drug possession cases and other criminal cases start with a traffic stop and subsequent search of passengers.
In August 2014 I wrote about a Florida Court finding that in criminal cases of solicitation of prostitution the mandatory civil penalty ($5,000) is unconstitutional. Since then the matter has continued to be fought in courts. People who picked up charges of soliciting could still have imposed this penalty but depending on their representation, the sentencing court could have deferred imposing the penalty, left open the possibility of removing the fine or refused to impose the penalty all together.