Alison DiLaurentis was not actually killed in "Pretty Little Liars." Although her disappearance and presumed death are central mysteries in the early seasons, it is revealed that Alison survived an attack. The person who hit Alison on the head with a rock, believing she was someone else (Bethany Young), was Charlotte DiLaurentis (also known as CeCe Drake). Charlotte mistakenly attacked Alison, thinking she was Bethany, who intended to harm Alison's mother. Alison survived this attack but was later buried alive by Melissa Hastings, who thought the unconscious person was Alison but was actually Bethany Young. Alison's "death" was thus a case of mistaken identity and complex deception rather than a straightforward murder
. Throughout the series, Alison's disappearance and the mystery around her fate drive much of the plot, with various characters suspected at different times. However, the show ultimately reveals that Alison was alive and involved in many of the subsequent events, including tormenting the other main characters under different aliases
. In summary, Alison was attacked by Charlotte but survived, and no one definitively "killed" her in the series. The confusion around her apparent death stems from mistaken identity and elaborate schemes involving multiple characters
