According to newspaper delivery boy Finn, he rang the doorbell in Mr. Anzulewicz's apartment on Friday and got very suspicious when it was not answered even after a very long time. Finn then peeped in through the keyhole and saw Mr. Anzulewicz lying in a pool of blood.
The police arrived in the old man's apartment and found him dead. In the apartment, they found:
- 2 bottles of warm milk,
- A Tuesday newspaper
- Assorted gifts
How did the police deduce the murderer's identity so quickly?