Who does he Suspect and Why ?

A wealthy man lives alone in a small cottage.
Being partially handicapped,
he had everything delivered to his cottage.

The mailman was delivering a letter one
Thursday when he noticed that the front door was ajar.
Through the opening he could see the man's body lying in a pool of dried blood.

When a police officer arrived he surveyed the scene.
On the porch were two bottles of warm milk,
Monday's Newspaper, a Catalog, Flyers, and unopened mail.

The police officer suspects it was foul play.

Who Does he suspect and Why ?

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Answer :
The Police officer suspect the newspaper delivery person.
The absense of Tuesday's and Wednesday's newspaper indicates that
the delivery person knew there was no one there to read it.