Why doesn't Railway Police check criminal minded travellers in the trains seriously who keep weapons with them?

Railway police does not check criminals with weapons simply because of the fact that they are themselves ill equipped. If they catch them, the criminals because of their track record resort to corrupt practices and are let off. And what would be the fate of those who catch them.Taking this in mind the police on duty would not dare to catch those criminals. More often than not those criminal minded people have nexus in the police force too. Hence the malaise. In the process the common people suffer.