Eye-in-the-sky noun phrase informal
Surveillance above your head or in the sky, such as a camera or a police helicopter
The eye-in-the-sky in the store can prove that I didn't steal your phone.
Eyes-in-the-sky have helped the police a lot in solving cases.
someone believe that they are allowed to do whatever they want in their own home
It is always advised that wherever you go, a man's home is his castle