The killer was:
Sarah Lin — The Best Friend
What Really Happened
Emily had recently discovered that Sarah had been secretly stealing money from the company.
Emily planned to expose Sarah during the wedding reception.
Desperate to stop her, Sarah decided to act.
Earlier that evening, Sarah prepared a poisoned champagne glass for Emily.
But when the drinks were placed on the table, the glasses were mixed up.
To make sure Emily received the poisoned drink, Sarah switched the glasses just before the toast.
However, she made one mistake.
She took a small sip from the glass before switching it — leaving lipstick marks on the rim.
That clue eventually led investigators directly to her.
Detective Challenge
Did you solve the mystery before the reveal?
Comment below:
✔ When you figured it out
✔ Which clue gave it away