So, if the guy bought a ticket and walked in with all the others, people saw him with his red hair. There would be lots of witnesses who stood in line with the guy and couldn’t have helped but notice the red hair. Those lines are usually long, lots of time standing around doing nothing but crowd watching, lots of witnesses.
You can buy tickets on line and pick them up at a kiosk in the lobby. Just scan the bar code on you printout.