Crucifixion Of Christ (Quran 4:157)
There’s no way for us to know with certainty who that person was. God kills many innocent people all the time. The key thing to keep in mind is that this world is not created on the principle of justice – it is created on the principle of test. Justice will be served on the day of judgement, and if the person killed was indeed innocent, he will find a much greater reward for his sacrifice than what he could have achieved in this world.