How was the real case adapted?

From the perspective of science and engineering students, ordinary people could get a general idea of real cases that happened in society from the Internet or the news, but it was impossible to know the details. In order to know the details, two conditions had to be met. The first was the police's cooperation. They would show you the interrogation records and provide you with all the necessary information for the creation. The second was to interview the parties involved in the case and the people who knew them.
There were many novels, movies, and dramas on the Internet that were adapted from real cases. Even if the author, director, screenwriter, etc. had excellent writing skills, they could interview people who knew the person involved as long as they paid for it. However, interviewing the person involved in the case (who had already been arrested) required the permission of the police. If the person involved in the case was already dead, it would be difficult to understand the details of the incident. The police, the prosecutor's office, and the court had to know the details of the case when they judged the crime. If these government officials were not willing to provide the details of the case, the authors, directors, and screenwriters could not adapt it. If it was adapted, it would be different from the real situation.
It was very far.
Also, for those law enforcement programs, they also needed the investigators to provide detailed information before they could shoot a film that matched the real situation.
I've searched online, but no one said that the investigators provided relevant information about the case.
Many novels, movies, and TV series, did the state's public security law require others to write novels or make them into movies and TV series? Otherwise, I would doubt the authenticity of this. There was a movie called "Save Mr. Wu." Mr. Wu was the person who was kidnapped and also acted in it. His own story was more realistic, but the police and the criminal had to provide information on the case before the movie could be filmed... If the author, director, scriptwriter, and others deliberately adapted something that was not real, it would be a different matter. There was no need to discuss it. There were also some conversations that the parties involved might not even remember themselves and could only be artistic. There was no need to discuss them.
If the Public Security Bureau and the Public Security Bureau are unwilling to cooperate, I don't think anyone can complete a novel or film series adapted from a real event. Many things, if not investigated, would completely change in the end. It did not match the person's inner thoughts at all.
Those who know, please answer. Thank you.

Answer 1

The adaptation of real cases usually followed certain principles, such as:

1. Respect the original facts and evidence. The author of the adaptation had to ensure that the adapted work did not violate the facts and evidence of the original case and did not violate the intellectual property rights and other rights in the original case.

Maintain legal compliance. The author of the adaptation had to abide by the relevant laws and regulations to ensure that the adapted work did not violate the legal provisions of the original case.

3. Keep the core elements of the original case. The author had to retain the core elements of the original case, such as the facts of the case, the characters, and the storyline, to ensure that the work was consistent with the original case.

4. Make appropriate adjustments and cuts. The process of adaptation and reduction needed to consider the integrity of the story, the character's personality and development, the rhythm and tension of the work, etc. to ensure that the work could better express the intention of the adaptation.

5. Create new plots and characters. An editor could create new plots and characters to enrich the story and character development of the work, making the work more interesting and fascinating.

The adaptation of a real case requires respect for the facts and evidence of the original case, legal compliance, and the preservation of the core elements of the original case, as well as the creation of new plots and characters.