Back to the story.
It appears the Guards think the gods buried the body which does not sit well with Creon and so he accuses them of doing it for money. (that money thing again that Pat brought to our attention)
Then Creon flexes his power muscle so that the Guards must then save their own necks and prove they did not bury the body for personal gain.
GUARD:
Alas!
It's terrible when the one who judges judges wrong.
CREON:
Quibble now about judgments; but if you
don't show me who did this, you will affirm
Looks like she could be the scapegoat for the Guards who then distance themselves from her - someone is going to have to take the fall for this - this exchange makes it sound like the guards are trying to free themselves from the wrath of Creon and are leaving it to him to assess Antigone's guilt or innocence.
GUARD:
My lord, a mortal should never swear that
something cannot happen, for hindsight makes
liars of our plans. Just now I swore I'd
never come back here, because of those threats
you shot at me, but the greatest pleasure
is the joy you didn't even hope for.
I came here, despite my oaths to the contrary,
bringing this girl, who was captured performing
the rites of burial. This time no lot
was shaken; no, this one was my good luck,
no other's. Now then, my lord, you take her,
as you wish, and question and sentence her.
I've justly freed myself from these troubles.
Their explanation sounds like there was a dust devil that is typical during mid-day that they call a divine storm - here is a great explanation
http://tinyurl.com/7mru5o3 and when the dust devil passes they see her
as Ginny says,
tidying upGUARD:
...
The whole sky was filled. We just closed our eyes
and rode out the divine storm. After a while,
it ended, the girl was seen, who was wailing
bitterly like the shrill voice of a bird
who sees her empty nest, stripped of its nurslings.
Thus she screamed, when she saw the uncovered
body: She groaned loudly and called down evil
curses on whoever had done the work.
Immediately she gathered dry dust
in her hands and from a jug of fine bronze
lifted up she crowned the corpse with three-fold
libations. We saw it and rushed forward,
caught her quickly, completely unperplexed.
We questioned her both about the previous
incident and the current; she stood in
denial of nothing, something for me
both sweet and painful, all at once. Nothing
is sweeter than escaping trouble for
yourself, but it's painful to conduct friends
into it. But, for me, everything
takes second place to my own safety.
Not much lee way here - the Guards with their demanding accusations, Creon wanting revenge and no one of importance to stand up for her she confesses - more than likely her clothes and face are dusty with tear stains streaking down her face.
I think she instinctively knows all she had left was her integrity - the Guards are too many and showing anger - an often response to fear and they were fearing their own death - she knows that Creon is not a friend, he did make a special trip to be sure the sisters know his plan for her dead brother and so if she is going to preserve any dignity her choice is to become part of the saga of her birth and she owns up.
At first she hangs her head but then she uses her final hours to unleash her anger challenging Creon. I see her acting like the people of Syria who, granted are many, are rebelling knowing that death is probable. She knows her end is all she has and she wants to make her end meaningful. Not accepting her sister's offering as a co-conspirator seems fitting on many levels - why completely wipe out the family - she knows her sister was not in favor so why see her death. It would take away from the purity of her action which is tied to her integrity and as Ginny found in her research, it would subtract from her identity as a woman.