Seeing a lot of people wondering about the 3 coffees that Kirkland had and wondering if it was a clue and if so what. I'm really surprised so many are confused by this since so many of us here obviously suffer from it. It's Kirklands phobia people! He is extremely OCD. Maybe I see it more clearly than others because I have a son who has Aspergers syndrome and that is a key symptom. His hand movements, his constant positioning of things in certain places like his torture tools. He even says as much when he says, "I like to be thorough."

Each suspect has a phobia of some sort....

Partridge-flies
Haffner-Spiders
McAllister-Birds
Smith-heights
Bertram-how other see him, especially the media
Stiles-I'm not sure about yet, but I'm sure he has one
Kirkland-OCD

The coffee is nothing more than drawing attention to his phobia like they have everyone else in the last few episodes.