The florist has just been murdered, and you, a freelance detective called on to the case by the police, arrive at the crime scene. Three suspects are present in the flower shop: the florist's assistant, the boss of the oil shop next door, and a person who was caught running away from the crime scene shortly after the victim's scream was heard.
On the floor is a blood-stricken ripped piece of paper with the numbers 550971051 in the florist's handwriting.
Who was the murderer?