Hogan jail tapes?

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Unless you live under a rock, you have seen and heard about Nick "Hogan's" recorded conversations with his parents while in jail. He is behind bars for racing his car and wrecking it, rendering his passenger nearly comatose. In the recordings, we hear what sounds like the Hogan family basically blaming the victim for his misfortune...because he is a "negative person." In another clip we hear Nick complaining about his accommodations and hoping for leniency, such as house arrest, from the judge. He also asks his dad to look into a "REAL-ality deal" for him. That's not a typo, that's how the genius pronounces reality...almost as if he's trying to read a script. Anyway, the news has their spin on the whole thing, of course. My question is, how did these tapes get made public? From what I understand the possibility of recorded convos in jail are posted pretty much all over the place. I can't vouch for this myself as I've never visited anyone in jail. Even if it is stated that convos are recorded, does that automatically mean they can be made public? Why do we not hear of juicy jail convos more often?