Why Did Top Madoff Associates Put Newly Fabricated Financial Documents In The Freezer?

So investigators wouldn't feel their warmth and
Know they just came from the printer
Which likely would've caused Bernie's empire
To prematurely collapse and splinter.

To appeal to corporate thieves, Xerox
Should introduce a new tool:
A printer whose pages will emerge from
The copier not warm but cool.

http://www.thedailybeast.com/articles/2013/12/03/madoff-henchman-rats-out-co-workers.html