I did not understand this scene in *Unknown* (2011) at all, an old guy called Rodney Cole rings up Ernst Jürgen and wants to meet. Ernst Jürgen then instead of using time between phone call and Rodney's arrival to escape, or even prepare a trap for Rodney, he does nothing but wait.

They're both old and would hardly resolve to a fight, even though Rodney probably would win due to sheer size over Ernst, yet a physical encounter never came to it as when Ernst tells Rodney he knows he is from "sector 15" he then takes cyanide powder and dies. 

Why did Ernst Jürgen commit suicide??