What Does "it must be someone from inside" Mean?
Learn what "it must be someone from inside" means, when people say it, and how to use it naturally in English.
It must be someone from inside.
It means the speaker thinks a person inside the group or company is responsible.
From Why I Did It, Episode 39
When do people say this?
Scene Context
Someone concludes that a hidden insider must be involved.
Usage Scenario
Use this when you suspect an insider in a theft, leak, or investigation. It is useful in mystery and crime contexts, but not especially searchable as a phrase page.
Better ways to say it
It must be someone from inside.
Someone from inside must be involved.
There must be an insider.
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