Logan (movie)
Two years ago the Reavers found a way to manipulate Charles's powerful brain and through it they maked a psichic attack that killed and injured 6000 persons, their plan succeeded as Charles was indendtify as a threats for the world and the X-Mansion was closed with the survived X-Men's members escaped, this leaved Charles in a shock status that maked him have Alzheimer forcing his mind to forget all of that but also to having needs of medicins to being mentally sane and to not having psichic attacks.