Another reason might be related to the political situation in the wizarding world in this fanfiction. If there are new laws or a more authoritarian regime, Harry's actions that were once heroic could now be seen as criminal. For example, his opposition to the Ministry of Magic in the original series could be turned into actual illegal activities in this new narrative.
One possible reason could be a different interpretation of his actions. Maybe in this fanfiction, his use of magic outside of Hogwarts' approved ways is seen more harshly. For example, when he used the Patronus charm to save himself and Dudley in the 'Order of the Phoenix', in this alternate view, it might be considered a criminal act due to the Statute of Secrecy implications.
It could be that the author wants to explore a darker side of Harry's character. Perhaps they see his natural inclination to break rules, which was often for good in the original series, as something that could lead him down a more criminal path. For instance, his sneaking around in Hogwarts at night could be construed as more devious behavior rather than adventurous in this fanfiction.
The 'Harry Potter' series is far from being a 'criminal fanfiction'. J.K. Rowling created a magical universe filled with positive values. Harry and his friends are constantly fighting against the real criminals in the story, like Voldemort and his Death Eaters. It's a story about good triumphing over evil, not about criminality.
One reason could be to add a new twist to the story. Fanfic authors might want to make the familiar character of Dumbledore more unpredictable. Another reason might be to explore the idea of power corrupting. Since Dumbledore had a great deal of power, showing him as insane could be a way to show how that power might have affected his mind over time.
In certain criminal Harry Potter fanfictions, the Forbidden Forest becomes a hub for criminal activities. There could be a story where a group of outcast wizards make their base in the forest and engage in illegal trading of dangerous magical creatures. Also, some fanfictions might explore the idea of a criminal mastermind who manipulates the Triwizard Tournament to carry out their devious plans, which could include stealing the Triwizard Cup for their own gain or causing harm to the champions.
Well, it completely flips the script. Instead of being the hero, Harry is now a criminal. This changes the way we view the other characters too. For example, the relationship between Harry and Dumbledore might be seen in a different light. Dumbledore's guidance might be seen as either misguiding Harry into criminal behavior or as an attempt to control a potential criminal.
It allows for character development in new ways. When the characters face criminal situations, they have to grow and adapt. For instance, Harry might have to use his skills in a more devious way to catch a criminal wizard, which shows a different side of his character.
One common theme is the combination of magic and mystery - solving. The magic from Harry Potter adds a new dimension to the crime - solving that the Criminal Minds characters are used to.
One reason could be a reaction to the Ministry of Magic's mismanagement. In the original story, the Ministry often made mistakes and had corrupt elements. In fanfiction, this could lead to Harry becoming an anarchist as a way to oppose such a flawed system.
Well, it depends. On one hand, some might see it as unethical as it can distort the original positive themes of Harry Potter. For example, if it involves making the beloved characters do truly heinous criminal acts that go against their established natures. But on the other hand, as long as it's clearly labeled as fanfic and not trying to pass off as official canon, it can be a form of creative exploration. Writers might be exploring different aspects of the magical world through a darker lens.
It could be due to a spell. There are many dark spells in the wizarding world that might cause a person to feel cold. For example, some curses can drain the warmth from a body. If Harry was targeted by such a spell, he would be cold. Also, it might be related to his emotional state. If he was feeling lonely or scared, it could make him feel cold inside, just like when people are in a bad mood in real life, they might feel colder than usual.
One popular 'Harry Potter criminal fanfiction' could be 'The Darker Side of Hogwarts'. It delves into the idea of criminal activities within the wizarding world that the main characters have to face. It's full of mystery and suspense.