Visible crew/equipment: When James Charles, the guidance counselor, says, "It could be someone you know, or it could be a stranger you pass at the grocery store," the actors' red T-marks are visible on the floor at Reid's and Gideon's feet. Then when Charles continues to say, "gathering information on the case," we can also see the actor's white T-mark beside the counselor's feet, where he will stand after he introduces Gideon.
No Way Out - S2-E13
Visible crew/equipment: When George is talking about the school bus, you can see the shadow from a microphone in the bottom left hand corner. (00:35:25)
Visible crew/equipment: A possible cameraman's hand with a wedding ring holding a bar with the camera is visible as one of the victim looks down a two way route. (00:24:50)
Visible crew/equipment: A crewman's left hand (with wedding ring) on a black metal railing is visible on the left side of the shot of the woman at the corridor intersection. (00:24:57)
Visible crew/equipment: You can see a crewmember's hand as she runs through the tunnels. (00:24:57)
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