Pervert the course of justice

Pervert the course of justice is when someone does something to make the police or the courts follow the wrong path in a case. It's like when you and your friend are playing hide-and-seek, but your friend cheats and tells you where they're hiding. That's not fair and it ruins the game.

In the same way, if someone tries to cheat in a court case, they are perverting the course of justice. This could happen if someone lies, destroys evidence, or tries to stop witnesses from speaking in court. This is a very bad thing to do because it can make the wrong person look guilty, and the real criminal goes free.

That's why it's very important to always tell the truth and to let justice take its course.