Greyhound X: Ending Chapter EXPLAINED

Section 1:
David is sent to return to Earth and find out what happened to him, basically how he became part Katarian. When he gets to Earth, he starts by heading to the very grounds where he became a Task Force soldier. He got the following:

Audio Transmission Activated:

´´Subject Bio: Greyson Remerus Bloodhound, Age; 17, Greyhound training may start. We found tech to adjust his damage rate in combat``