Why did he ask for the Stranger to be arrested ?

In a hotel a man is sleeping when he hears a knock on his door.
He shifted the blanket and stepped down from his bed.
He walked to the door and opened it to find a stranger outside.
Upon opening the gate, the stranger said,
"Pardon me I must of made a mistake, I thought this was my room"
The stranger then proceeded to walk down the corridor.
The man closed the door and immediately called security.
He asked them to arrest the stranger with immediate effect.

Why did he ask for the stranger to be arrested?

What made him suspicious?

Click here for Answer

The Stranger should not have knocked his own door if it was his hotel room