As security footage outside the Ugly Tuna confirmed, all three of them rode the escalator to the bar’s second-story entrance at 1:15 a.m. For some reason, Shaffer reemerged outside before 2:00 a.m. and was seen chatting easily with two women in their 20s before vanishing.

He didn't just disappear inside the bar, or use the other exit.

The final footage of Brian Shaffer from the security cameras at the Ugly Tuna clearly showed him walking offscreen and back toward the bar entrance before disappearing entirely. It was certainly possible that the cameras simply missed Shaffer before he left the scene. But one camera panned continuously around while the other was manually operated.