The Agrawals reported a robbery. When the detective arrived Mr. Agrawal was............What made the detective so sure?

Question

The Agrawals reported a robbery.

When the detective arrived Mr. Agrawal was waiting outside and he said,

“All the wife’s jewels are missing. You’ll want to check inside for fingerprints.”

Mr. Agrawal pointing to the broken window glasses outside the house told the detective,

“The burglar presumably entered the house by breaking through the window.”

The detective replied, “That won’t be necessary. There’s been no burglary.”

What made the detective so sure?

Answer 1

The glass pieces wouldn't be outside but inside (he has to break the glass inward) if the burglar tried to get into the house. Hence no burglary but a staged robbery.