Ariz. Rev. Stat. § 11-583
A. The public defender and his full-time deputies shall not engage in the private practice of law, except:
2. Deputy county public defenders may, but in no circumstances shall be required to, represent private clients in pro bono, private civil matters under the following circumstances:
(k) The attorney's supervisor may require the attorney to submit a prior written request to engage in pro bono work which includes a provision holding the agency harmless from any of the work undertaken by the attorney.
Notwithstanding any provision of law or rule to the contrary, representation by an attorney of a pro bono client shall not disqualify the office from subsequently participating in any action affecting the client.