If these remarks are factual, this means Rush was arrested and he submitted to such arrest voluntarily after a warrant for arrest was issued.
The legal process after such arrest, whether the DA drops the charges, offers to dismiss it in exchange for a "deal" and a judge agrees to an adjournment in contemplation of dismissal (ACD) in 18 months (or other "terms" of a deal), or chose to pursue the matter through trial (which the DA did not) are the legal processes which follow arrests.
Nope...sorry. An "arrest" is the process by which a person is taken into physical care and custody of the state, for whatever purpose. It is possible to present for booking, and to post bond (assurance to appear at some future time and place), without having been formally "arrested."
Payed bail... huh. For what? Government administration fees? The DA's next Christmas party?. There's no flight risk here, not that Rush [LOL!] would run because there will be no trial.
The dumbass prosecutor should be prosecuted for malfeasance.
What am I missing? How can you charge someone, allow them to plead not guilty and then not pursue the case?