Only one thing you can do: Hire an attorney ASAP! The arrest is a violation of the terms of the "accelerated rehabilitation" program which could result in the charges that were covered by the AR program being redocketed for further prosecution. Also, possession and/or possession within 1500 feet of a school carries mandatory prison time.
Attorney Thygerson has the correct advice here. If you are on AR and you have any sort of police contact that could be considered grounds for termination of AR. Contact an attorney immediately, Attorney Thygerson is an excellent attorney in this regard and I'd recommend him in this type of matter.
This response is to a question posed in what is considered to be a hypothetical situation. The response is for educational and reference purposes only and should not be relied upon as legal counsel. No fees are to be exchanged for this response and the attorney/client relationship has not been established in this context. You should contact an attorney within the jurisdiction of this matter for legal counsel.