[tired_old_conservative]

The police don't have to officially request that specific evidence be preserved for you to wind up being charged with destruction of that evidence. Destroying obvious evidence at a known crime scene falls well within the definition of an illegal order as discussed by Non-Sequitur.

[OneWingedShark]

But you’re supposed to ASSUME that unless the orders are BLATANTLY illegal that the orders are valid, no?
(Besides which, how many young enlisted-grunts are going to know the details about laws regarding evidence?)