Lateral thinking puzzle:🔍🔍
The police receive an anonymous phone call telling them the whereabouts of a wanted murderer.
The police have no photograph or description of the person. They only know that his name is John.
The officers raid the apartment they were told about and find a carpenter, a doctor, a mechanic and a lawyer all playing poker together.
Without hesitation or any communication, they immediately arrest the carpenter.
How do they know he is the murderer?
