[s6e7]: Middle Man

: The killers are a "pack" of three college students:

: The stand-off ends violently. Michael is killed in a shootout with authorities, and Chris is gunned down shortly after. Stephanie is rescued safely, but all three members of the pack die. [S6E7] Middle Man

: The newest, most impressionable member. : The killers are a "pack" of three

The BAU determines that the killers are most likely college students because the murders began at the start of the fall semester. They describe the group dynamic as a "pack," where a dominant alpha manipulates "weak-minded" followers into committing crimes they otherwise might not. Chris. The Profile

: The investigation is hindered by the local sheriff, Salters, who is revealed to be protecting his son, Chris. The Profile