When Richter heard that they lost contact with Henry, he could no longer contain his rage and screamed. He then proceeded to destroy his room, he punched the walls, kicked the closets, and started shooting randomly at the air.
...
Henry who was now dead would be surprised to see Richter this angry. Henry before dying truly thought Richter sent him to Sayaka to die, yet the truth was different. In Richter's eyes no matter how famous the current Shadow was, he was nothing but a second grade assassin, not to mention the target was the weaker Sayaka. Richter truly believed that one of his subordinates was enough to handle such a situation. Since in his eyes both the current Shadow and Sayaka were nothing but babes that could barely survive a real battle.
He really didn't expect that his subordinate that has been carefully handpicked by the Greyhound family to be this weak.
So once Richter was able to calm down a bit, he called for the four who had finished their mission properly.