The primary piece of evidence in Robert Kraft's solicitation of prostitution case is at stake.

Florida prosecutors are trying to salvage the evidence after a circuit court judge ruled last year that Jupiter, Florida, police improperly received and executed search warrants.

Without that evidence, legal experts have said the misdemeanor case against Kraft and 24 other defendants could fall apart.

The key question is whether police "minimized" surveillance as required under the law. Kraft's attorneys convinced Judge Leonard Hanser last year that police violated the defendants' rights by running video indiscriminately for the entire three days of their investigation, failing to stop recording when it was clear that some parties were not receiving illegal services.