The contents of envelopes must have been some type of official paperwork on military tribunals and people (US civilians) on jury panel.

Why its important for Q to have us get info out, [Y] its important to keep the Q LARP line going.. to try to get as many people NOT to listen to what is going on.. so when we are on panels (god I only hope I get to) they dont want people knowing their crimes.

Just another guess as to what the criminals saw in those envelopes.