Later, when talking to Harry, Ron, and Hermione about the death of his mother, Hagrid admitted that she was not a great mother at all.
During his third year, Hagrid acquired one in what would be a long line of dangerous pets: a young Acromantula, which he named Aragog.
That same year, fifth-year student Tom Marvolo Riddle, who would go on to become Lord Voldemort, opened the Chamber of Secrets and unleashed a far more dangerous monster, which Riddle used to attack and petrify a number of Muggle-born students until he finally caused the death of a girl named Myrtle Warren.
The then-Transfiguration teacher Albus Dumbledore, who was convinced that Hagrid was innocent, nonetheless convinced then-Headmaster, Armando Dippet, to give Hagrid the job of Gamekeeper and allow him to remain a resident of the school.
He'll be goin' to the finest school of witchcraft and wizardry in the world and he'll be under the greatest headmaster that Hogwarts has ever seen; Albus Dumbledore." After Harry was accepted to Hogwarts in 1991, Hagrid was given the task of finding Harry, as Harry's uncle Vernon was doing everything in his power to prevent his nephew from receiving his Hogwarts acceptance letter.
On Harry's eleventh birthday, Hagrid found the Dursleys and Harry in an extremely isolated Hut-on-the-Rock, and accidentally broke the door down from the force of his knocking, much to Vernon and Petunia's intense displeasure; Vernon threatened him with a gun, demanding that he leave, only for Hagrid to contemptuously seize the gun and twist it into a knot like it was rubber.
Voldemort's first reign of terror lasted years and turned friends against each other.
It was said that during this time it was difficult to trust one another, as you did not know for sure who had gone over to dark side.