Board Thread:General Discussion/@comment-26907565-20160215225238/@comment-31166511-20170227225114

Sorry about the level of difficulty. I'll try to tone it down.

What I thought was the easy part of the answer was:

Agent Powers.

He is seen wearing body armor, probably a kevlar vest, at the end of the episode in which Dipper tries to prove to Agents Powers and Trigger that the journal is real by summoning a zombie.

The other law enforcement officials wearing body armor are Sherrif Blubbs and Deputy Durland.

That should be plenty of give away clues. Which leaves only one small part of the mystery left:

Name the episode and describe the scene in which Blubbs and Durland wear body armor. It is not a hidden background scene, it is front and center.