After a murder, a detective finds a note written in invisible ink. What approach should the detective take to uncover the truth?
Category: Mystery · Difficulty: expert
Hint: Think about methods to make invisible ink visible.
Answer
Use heat to reveal the message.
Explanation
Invisible ink often responds to heat, allowing the detective to reveal potentially crucial information regarding the crime.
This is a expert mystery riddle — one of the harder riddles here. The answer is Use heat to reveal the message..
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