He can be hired indefinitely. Stop calling the PO and start calling lawyers and hire one. That's the best bet you have of getting a hearing quickly.
I agree. An attorney can expedite the hearing, but the PO isn't going to. An attorney can also persuade the judge to let him get back to work where he can be productive, instead of just sitting in jail. Find and hire a lawyer. Contact my office if I can be of further assistance.
No attorney client relationship has been, or is being formed as a result of this response to your question. If you feel you need legal advice, you are strongly encouraged to retain an attorney and consult with that attorney about this issue.
Unlike a new case, probationer's can be held indefinitely on a probation warrant. I have dealt with this issue before. The remedy is to hire a lawyer to request a probation bond and/or negotiate a resolution with the State. Note that he may be looking at more time in jail for this violation. The law authorizes the judge to revoke up to two years of his probation for this technical violation. Moreover, I have known judges that require a 6 month revocation for even the most minor technical violations. This only happens with some judges. However, even two years is a possibility.