I would like to know how do you know if the player xiter only by the statistics of the player, and if it has how to implement the BF4DB in the server?

Judging on if the player is a cheater or not is based on the evidence given such as Insane/impossible rounds played (100 kills 80 headshots) or just obvious usage of cheats like using pickup weapons on maps they don't exist on. Judging by stats is based on knowledge about the game for example every weapon has it's damage model, if someone does way more damage with a weapon it is intended to make it is most likely a cheat such as a damage mod.

The plugin however that is going to be used to stream our banlist is still in development and will be published soon, thanks for your patience!

~Nadeko