Murder Mystery: Who Killed the Chemical Engineer?

Got this riddle on WhatsApp today, found it interesting so sharing it here.

Read the riddle and then put your detective hats on to crack this murder mystery.

A known chemical engineer professor was found murdered at his home this morning. 

The detectives investigated and narrowed it down to six suspects. 

The names of the suspects were as follows;

Frank, Mark, Alex, Nicolas, jonathan and Steve.

The detectives then found a note with the body which had the following numbers: 


The detectives arrested the murderer on finding this note. 

Who was the killer?

So were you able to solve the murder mydtery? If yes, leave your answers in the comment section below.

You can check if your answer is correct by clicking on show answer below. If you get the right answer, please do share the riddle with your friends and family on WhatsApp, Facebook and other social networking sites.

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