Your report should include a rough estimate of height / weight. Also, it's pretty unlikely that any eye witness would be able to be as specific as "mid-twenties", especially if he's in a hoodie. You would have had to literally be right on top of him, and yet you didn't apprehend him, making you pretty much the worst security guard in the world.
Also, how did you zoom in on the license plate? If you're sitting behind a desk with cameras, then how was it the suspect realized security was in the building?