The Waterfall Bar & Grille is the Canton tavern where John O'Keefe, Karen Read, Brian and Nicole Albert, Jennifer and Matthew McCabe, and others converged the night of January 28, 2022 — the last public place O'Keefe was seen alive. The group arrived after a first stop at C.F. McCarthy's and stayed until closing. Bartender Rebecca Trayers testified that O'Keefe ordered a beer at the bar; Nicholas Kolokithas, who saw him up close, "didn't observe any injuries." Nicole Albert described O'Keefe's clothing — "a hat on, some sort of just sweatshirt, jeans and sneakers" — no winter coat.
The Waterfall's surveillance video and the parking-lot exit became load-bearing prosecution evidence. Trooper Yuri Bukhenik testified that the video shows "nine drinks being consumed by the defendant" from her arrival at McCarthy's through her departure from the Waterfall. Karina Kolokithas, leaving the lot at the same time, testified Read "was walking to the driver's side" — anchoring the prosecution's timeline of who drove to 34 Fairview. Chris and Julie Albert testified Read brought her own drink into the bar from McCarthy's under her jacket.