At the police station, Armin sits opposite another police officer.
The officer says: "After taking your particulars I have some questions about your mother."
Armin says: "Yes?"
"Could you imagine who has poisoned your mother?"
"Maybe the one she had been dining with?"
"And who could have been that?"
"I don't know."
"You did not have much contact with your mother, did you?"
"None."
"Do you have an alibi?"
"When precisely did she die?"
"Late afternoon. Between five and six o' clock."
"At this time I ate alone at home."
"Well, you really had no contact with your mother. If there comes anything through your mind, please call."
"Sure."
"Good bye."
"The same to you."