This is the murders happened.
When JTia and Jin got to there rooms there was a message waiting for them written in blood on their walls. It said “Come to the tennis courts and play a game for your life.” JTia also found a note for Jin on her desk. She ripped it out of the note pad and stuffed it in her pocket, the words “Jin I l” were left behind. When they got to the tennis court there was a note posted on the net instructing them that the loser of the game would lose their life. What they weren't told was that the winner would die too. They found rackets with their names on it and a couple balls, which the killer ordered from www.explosives.com. Jin serves the first ball and when JTia tried so return it, KABOOM. Curious, Jin went over to inspect JTia just to find that she was dead. He also found a closed note in JTia's pocket with his own name on it. There was a piece torn off the corner but this is what he could read: “ike your style. Meet me in the Green House if you want live and be my partner. X” Scared, and somewhat curious, he went to the Green House but when he got inside, the door slammed shut behind him and the room started filling with Nitrogen Dioxide killing Jin.