Well, sort of. It takes some elements from real-life situations and fictionalizes them to create a compelling narrative. So, it's a mix of reality and creativity.
Again, without clear knowledge of this specific 'the informant real story', but generally key elements could include the informant themselves, their motivation for coming forward. For example, it could be conscience, revenge, or a desire for justice.
It's hard to say for sure. Some so-called informant stories could be mixtures of truth and fiction. It often requires further research or background knowledge to determine their authenticity.
The Informant had its roots in reality. But like many movies based on true stories, it took some liberties in the storytelling to create a compelling cinematic experience.