Character mistake: At the end of the episode, Rossi quotes Anne of Green Gables author Lucy Maud Montgomery, but accidentally calls her "Lucille".
Character mistake: When Emily Prentiss makes note of the 110 V outlet having no GFI, she calls it 'Ground Fault Insulation', when in actual fact, GFI stands for 'Ground Fault Interrupter'. (00:11:00 - 00:12:00)
Character mistake: When Morgan looks up Charlie Luvet's car GPS map history, the last address reads "11257 Palmdale Drive," but when Morgan phones Hotchner with the address he says, "11257 Palm Drive."
Answer: "The Boogeyman", s02e06. Spoiler alert: The kid is Jeffrey Charles and at that point he had already killed 3 other kids. Jefferey basically hated and resented other kids after his mother abandoned him and his father spent a lot of time with other children because of his job. Jeffery would lure kids Into the Woods and then beat them to death with his bat just because of hate, no particular "reason." The scene you're describing, Jefferey agrees to walk Tracy home when her "buddy" leaves her (at this point the FBI announced there's a serial killer on the loose and kids should walk with a buddy). Jeffrey gets mad at Tracy for walking too slow and for complaining, and he takes a swing at her, causing her to flee Into the Woods and have Jeffery chase her.
Bishop73