The Runaway Jury

When justice is for sale, every jury has a price 
In Biloxi, Mississippi, a landmark trial begins. There are hundreds of millions of dollars at stake and soon it swerves mysteriously off course. The jury is behaving strangely, and at least one juror is convinced he's being watched. Soon they have to be sequestered. Then a tip from an anonymous young woman suggests she is able to predict the jurors' increasingly odd behaviour. 

Is the jury somehow being manipulated, or even controlled? If so, by whom? And, more importantly, why?