Crime Scene Investigation

Detective Wong arrives at the classroom. First, he uses yellow tape to seal off the area to protect the clues.

He begins to interview the witnesses—a teacher and two students—to hear what they saw.

He uses a magnifying glass to examine the floor. He finds a piece of broken glass under the window and a strand of hair on a desk.

He spots a red bloodstain on a chair and finds a clear fingerprint on the door handle.

He carefully places every item into an evidence bag. Now, he has a specific suspect to arrest.