dragovic examined slides of her brain tissue.eurons, a cellar communication system that controls movement, memory, and emotion. dr. dragovic discovered repair proteins in florence's brain that were released after her head injury. this showed that florence's brain was struggling to survive long after she hit her head and before she drowned. dr. dragovic estimated that florence was lying on the cement for at least 90 minutes, possibly for as long as two hours, before she was in the water, and there was other conflicting evidence. the blood stain on the boat launch and the broken railing above did not line up. >> the trajectory of where she wound up on the deck was not in line with where the break in the railing occurred. >> to see whether the deck railing was structurally unsound, analysts tested an unbroken section of the deck railing using what's called a load cell. >> the load cell is more or less a scale. it's a series of springs and sensors, and it measures compression and tension. >> florence weighed 110 pounds. to simulate h