Complex sentence: Charlie identifies that the scratches that were very similar to the ones that the serial killer William Afton bore, thinking that it probably came from an animatronic, and she recalls the nerve-racking events that took place at Freddy Fazbear's Pizza.
Split into simpler sentences: Charlie identifies that the scratches were similar to those that the serial killer William Afton bore. Thinking that it probably came from an animatronic, she recalls the nerve-racking events that took place at Freddy Fazbear's Pizza.