Just saying guys, this story starts before all of the animatronics were evil.
Fazbear Entertainment opened Fazbear's Family Diner in the spring of 1984. It was a very happy and upbeat place. However, there was always suspicion about the Marionette, just because of its lack of teeth and purple stripes down its face that looked like tears. It would pop out of its box whenever the music box stopped. One night the security guard, Alexander Bennet, was cleaning up around the Prize Corner, and he had taken the night shift. The music box stopped playing music. But strange enough, the music remained playing. But the origin was somewhere else. It was inside of the box, where Marionette stays. He opened the box slowly, and Marionette was looking up at him. Only her eyes were different. They were all black, with white pupils. A sudden thought flashed in Alexander's mind, but he dismissed it. Marionette's eyes returned to their normal, happy look. He decided it was probably just a lack of sleep. So he closed up shop. He thought of the Golden Freddy Fazbear suit in the supply closet.
The next day, Alexander had just come in for the night shift. His daytime counterpart, Joseph Frederick, was just starting to leave. He told him that Marionette did not come out of her box that day. After Joseph left, he had the sudden thought to go check on the supply closet. The last group was still there, finishing up their meal. It appeared to be some sort of birthday. He told the family that he would be right back, he just had to go check on something. He walked behind the stage and went into the supply closet. He had to struggle back a scream, as he saw Marionette sitting on the table. Her eyes were all black with white pupils once again. She pointed at the Golden Freddy suit. Not really knowing what he was about to do, he slipped into the costume. He walked out of the supply closet, and the four kids all crowded around him, laughing and smiling. He wondered where their parents had gone. Probably into the bathroom. His mind began to go blank. He turned his head, and Marionette was standing in the doorway of the supply closet. Not sure what he was doing, he opened up Freddy Fazbear's suit. He lifted one of the four boys into his hands. He then began to force him into the suit. The kids were horrified and began to run frantically around the dining area. He snatched a girl and aggressively stuffed her into Chica the Chicken's suit. He snatched up the other two, forcing one into Bonnie the Bunny, and the other into Foxy the Pirate Fox.
Finally snapping back into reality, the Alexander was horrified at what he had done. What had come over him? He went back to the supply closet and removed the suit. He turned, and Marionette was standing in the doorway. It quickly left, and probably went back to the Prize Corner. Alexander left the prize room and found the parents of the children running frantically, looking for their children. They ask him what had happened. He searches for the quickest answer. He says he thought that everyone had already left. One of the parents called 911. The case lasted two days, until the security footage was found and revealed that Alexander had done it. Fazbear's Family Diner was shut down in the summer of 1986. More recent footage shows the animatronics not leaving roaming mode at night. Fazbear's Family Diner, at the time, was said to never be re-opened. That is not quite true, though.