She cant be tried in the same court for the same crime.
But everyone please look at the case in my siggy below. Cyrus Casby was tried for the 4 deaths of my student and my student's family (including his own 1 year old daughter) and was astoundingly acquitted.
But the crime was in the New Orleans BEFORE Katrina and the trial was AFTER so who is to say what was lost in the storm as far as evidence (as evidence rooms were ruined in some courts). Not to mention that so many potential witnesses has long left Louisiana in the aftermath of Katrina.
But it was a case that cried out for justice and the feds stepped in. My student (Cleveland) and his family lived and were killed in federally subsidized housing and that house was set on fire in the commission of the crime. So that is a FEDERAL crime. It CAN be tried again, this time with the feds (insert a happy dance here, I almost died of utter shock when I heard this a few months back).
Anyway enough of my OT stuff but miracles can happen. They can in cases that cry out for justice. Here are some links about that case that tell HOW and WHY he was tried again.
http://la.findacase.com/research/wfrmDocViewer.aspx/xq/fac.20120316_0000358.ELA.htm/qx
http://www.nola.com/crime/index.ssf/2012/10/federal_prosecutors_seek_delay.html
Presumably they will be using the same evidence that was presented at the first trial, and in that trial the jury went 10-2 for acquittal. The jury knew about the confession at trial. It implies that the remaining evidence was pretty weak. If he was acquitted on that margin in the first trial, chances are he will be acquitted again.
I don't think they can do that in this case because the federal government has to have an interest that was violated for it to fall under their jurisdiction, otherwise they can't lay charges and it is purely a state case.