Criminal Minds, Season 7

Reid:
What drove them to suicide?

Erin Strauss:
A freshman cadet, Bailey Shelton, hung himself two weeks ago in his room.

Hotch:
Identical bed sheet, hangman's knot.

Rossi:
Who takes sheets camping?

JJ:
They would if it was the plan. Could be a domino effect.

Rossi:
The campus would have been on high alert after the first one, so the kids wait until they're alone in the woods.

Morgan:
They must have made some kind of pact.

Hotch:
And there's something else. Six kids went on the trip, only five were found.