He met you while on a case. Beverly Katz introducing you as a friend and coworker from another district.

At first, he was standoffish and blunt, staying by himself when he was given the chance but after spending more time working together, you both were able to build somewhat of a friendship.

While working on a case, you spotted him. You waved when he glanced your way with a sheepish smile, he always looked so tired.