The killer was:
Alex Grant — The Gym Manager
What Really Happened
Alex Grant had been running an illegal supplement operation inside the gym.
Jason Cole had discovered the truth and planned to expose him.
Desperate to stop him, Alex sent the threatening email.
Later, while Jason was in the shower, Alex opened his locker and applied poison to the rim of his water bottle.
When Jason returned and took a drink, the poison entered his system.
But Alex made critical mistakes:
• He wore a black hoodie seen by a witness
• The threat email was traced back to the gym office
• Only he had access to both the office and locker area
Detective Challenge
Did you solve the case before the reveal?
Comment below:
✔ When you figured it out
✔ Which clue gave it away