Freddy Krueger is a fictional character and the primary antagonist in the A Nightmare on Elm Street film series. He was created by Wes Craven and made his debut in Cravens A Nightmare on Elm Street (1984) as the malevolent spirit of a child killer who had been burned to death by his victims parents after evading prison. In the dream world, he is a powerful force and seemingly invincible. Freddy Krueger goes on to murder his victims in their dreams, causing their deaths in the real world as well.

In the original timeline, Freddy Krueger was killed by the parents of the children he had killed by setting him on fire in the boiler room in which he committed his crimes. However, he was granted a decent bit of immortality and various supernatural powers to continue to haunt the human race by the Dream Demons, to whom he traded his soul right before his death.

In the 2010 reboot of the original Nightmare on Elm Street film, starring Jackie Earle Haley, Freddy Krueger was portrayed as a child molester who was burned alive by the parents of his victims.

In conclusion, Freddy Krueger is a fictional character who was killed by the parents of the children he had killed in the original timeline, but he was granted immortality and supernatural powers by the Dream Demons, which allowed him to continue to haunt the human race.