It occurred the evening of February 26th. The police observed he was bleeding from his nose and a cut on the back of his head. Paramedics attended to him on the scene. His attorney stated later that his nose was broken and the cut on the back required stitches.
No wonder he wasn't arrested.
While it is technically true that Zimmerman was not "arrested," those reports are very misleading. He was immediately handcuffed, taken into custody, and driven downtown for questioning. His gun was placed into evidence, and is still in the Police Departments possession, as are Zimmerman's clothes from that night.
All of these facts would surprise many people who have only read the media narrative, and most people would associate being handcuffed and taken into custody with "arrest" even if it technically was not an arrest.
Yet all of these facts are publicly available to anybody who is interested.