How to drop charges, and ensure that the state does not pick it up
I placed simple assualt and terroristic threat charges against someone in philadelphia who was on probtion in New Jersey, and now he is incarcerated in New Jersey. He does not yet have a court date, but I would like to write the judge a letter, so that he can have a copy when philadelphia comes to pick him up for court, stating that I am droping the charges. What do I have to include in the written letter to ensure that the state does not use the dective as a witness, or takes up the case. Thank you.