Ethan approached Michael initially to capture Brandon, his sister's former deadbeat boyfriend who apparently did a number on her face, putting her in the hospital, requiring life support.
When they finally caught up with Brandon they discovered that Brandon had nothing to do with it, and was ready to run. A scam artist named Ramsey, that Brandon stole money from beat her up in order to send a message. She was simply in the wrong place at the wrong time.
Before he left, on advice from Ethan, Ramsey tried to tie off the loose-end in his sister by poisoning her IV in the hospital. He was apprehended by the police before anything happened.
When the dust settled, Ethan told Michael he was going to talk to CIA Recruiters about a future job.
TriviaEditEthan is a skilled former US Special Forces Sniper (Green Beret), even beating Michael's former sniper course record during training.
His weapon of choice is the Barrett M98B .338 Lapua Magnum. It is a large weapon sporting a 3100 ft/s muzzle velocity and a 10 round box magazine, with a bolt action. The gun was more than enough to take out any flesh target like Ramsey. The round would've more than likely cut in him half at the close range featured in the episode.