"Angry mob kills offender"--will there be a REAL investigation? Or window dressing?

Because if it does turn out to be window dressing does that mean the lid's off? We can all just mob together and kill anyone we don't like--whether we know his name or not? The fact is that whatever that bloke did, whether he carries on living or not is ABSOLUTELY NOTHING TO DO WITH THAT CROWD. Vigilantism is supposed to illegal--will it STILL be illegal after this atrocity? Yeah--atrocity. What do YOU think, dear readers? Do you agree, or do you suddenly have a strong inclination to call ME a paedo, for not automatically shouting "hooray!" like a good, conforming boy? Proceed, sheeple.