the call is coming from inside the house

1.
USwidespreadinformalcolloquialidiomatic
- A figurative remark indicating that the source of a problem, threat, or wrongdoing is internal to an organization, group, or situation rather than external.
- An expression used to highlight that the cause of trouble lies within the people or place being investigated.
2.
USwidespreadinformalpopular-culture
- A reference to a horror-movie trope meaning that a literal danger or intruder is located inside the building or house rather than outside.

Examples: