Learn useful ways to say "i've been investigating" in English with drama examples and natural alternatives.

This means the speaker admits they have been secretly researching or examining the other person's family.
From I Think My Wife Wants To Kill Me S2, Episode 10
Someone reveals they have been investigating the other person's family for a while.
Use it in serious or dramatic contexts such as investigations, threats, or confrontations. It sounds intense and would be unusual in normal conversation.
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