Tigry left TSP to go his own way...he left to go find the cure before Willow but at the Lab he looked around and heard some sounds and he entered a room and saw you...last time he saw you...you were working with the TSP like him before he left.

Tigry: "Why are you here? Are you here with Willow or against me...please be with me. Your my friend. The only one I trust."