A chemist was murdered in his own lab.
The only evidence was a piece of paper that had the names of chemical substances written on it.
The substances were nickel, carbon, oxygen, lanthanum, and sulfur.
The chemist only had three people come by his lab on the day of the murder: fellow scientist Claire, his nephew Nicolas, his wife, and his friend Marc.
The police arrested the murderer right away.
How did they know who it was?
Answer Of This Riddle Will Be Posted In The Next Riddle.
Find the answer for Sally Lives In A Place.
She waits to take the materials over during the colder months because the lake will freeze over, so she can walk over it.
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