A famous chemist was found murdered in his own lab. There was no evidence.........How did they know who it was and why?

Question

A famous chemist was found murdered in his own lab.

There was no evidence except for a piece of paper with the names of chemical substances on it, which he wrote right before he died.

The chemicals on the list were;

Oxygen
Carbon
Nickel
Lanthanum
Sulfur
On the day he was murdered, the chemist had only 3 visitors: his wife Mary, his nephew Nicolas, and his friend Johnathan.

The police arrested the murderer right away.

How did they know who it was and why?

Answer 1

The symbols of the chemicals spell Nicolas
.
Nickel = Ni
Carbon = C
Oxygen = O
Lanthanum = La
Sulfur = S

Answer 2

Answer:
Nicolas was the murderer
Because,The symbols of the chemicals spell Nicolas
Nickel = Ni
Carbon = C
Oxygen = O
Lanthanum = La
Sulfur = S