
Why did the time police not go back in time to see that Rick C137 taught evil Morty time travel?
In other scenarios the time police has decided to go back in time and stop the person in question from ever learning about time travel, such as when they went back to the stone ages to stop the snakes. Or when they beat up Einstein to try and stop Rick
But with morty they decided to arrest him. Why? They can travel through time, they can just travel to the point in time where evil Morty learnt about time travel and stop it from happening