Is there a law on the books that determines whether or not it would be lawful for the public to be allowed or denied access to the tapes?
If the tapes belonged to a government agency (ATC recordings, police 911's, etc...) then a Freedom of Information request (FOIL) could be made by anyone. If the agency decided releasing the contents could jeapordize an ongoing investigation, then the tapes could be redacted. If the tapes belonged to a private agency (as in the matter at hand), then the tapes could be requested by an attorney pursuant to a Subpoena Ducas Tecum. The private agency could contest the Subpoena. The matter would then be litigated and the balace test would be the relavancy and need for the tapes against the agencies privacy rights.