Super Sleuth

To earn this achievement you must find all four pieces of evidence in Hong's appartment.

Guide
Most of the evidence is in Hong's bedroom. Listen to the answering machine next to the bed. Read the emails on his computer. Check the clock on top of his wardrobe next to the door to the living room. Finally check the baseball bat behind his front door.

When you find the last piece of evidence Jesen will tell Malik that he's done and that he couldn't get more evidence without a foresic crew.