The Gym Entry

The case file

Someone got into the school after hours. The logs below are all verified -- the order has to be reconstructed. Which event happened immediately before the alarm tripping?

The rule: Every finding below comes from a verified log. Reconstruct the order of events.

The clues

1. The door sensor log shows the gym door sensor tripping at 10:49 PM, before the 911 call being placed.
2. The phone log shows the 911 call being placed at 10:56 PM, before the loading-dock camera flagging motion.
3. The keycard log shows the janitor's closet keycard being used at 10:30 PM, after the gym motion sensor firing.
4. The alarm log shows the alarm tripping at 11:34 PM, after the loading-dock camera flagging motion.

Who did it?

1. the janitor's closet keycard being used
2. the 911 call being placed
3. the loading-dock camera flagging motion
4. the gym door sensor tripping

The verdict is still sealed. The answer is revealed here tomorrow — or play today's case and render your own verdict now.