: Weaver targets people he believes are irresponsible drivers, acting out a vigilante fantasy to "punish" those who make the roads unsafe, mirroring the accident that ruined his own life.

The episode follows the Behavioral Analysis Unit (BAU) as they travel to , to investigate a series of vehicular homicides. The "Unsub" (unknown subject) uses a modified, heavy-duty truck as a weapon to run victims off the road or crush them. Key Plot Elements [S4E23] Roadkill

: The killer uses a specific stretch of highway known to locals as "Suicide 7" because of its dangerous, winding nature. : Weaver targets people he believes are irresponsible