Criminal Minds (2005)

S14E5 The Tall Man

Title: The Tall Man Plot: The BAU delves into a chilling local legend about the 'Tall Man' when two individuals vanish in the woods of East Allegheny’s Dead Man’s Conservatory. A third person mysteriously reappears the next day but can only provide scant information regarding her companions' fate. To aid in the investigation, JJ is compelled to revisit her hometown, which stirs up painful memories of her sister's untimely death when she was just 11 years old.