No smoking guns on this issue, but here are some interesting links on it...
petechial hemorrhage in coronary arteries/general vicinity of heart (in infants) due to brain injury:
http://aappolicy.aappublications.org/cgi/content/full/pediatrics;107/2/437
Cardiac ph due to causes other than asphyxiation (shock):
http://history.amedd.army.mil/booksdocs/korea/Vol3-BattleCasualties/Chap21.htm
ph as a result of intracerebral hemorrhage:
http://professionals.epilepsy.com/wi/print_section.php?section=cerebrovas_hemorr
Link showing that blood in BBB was due to head trauma, not livor mortis:
http://www.geocities.com/SiliconValley/Haven/9101/wecht.html
It appears that Dr. Wecht gave his information before all of the autopsy had been released. (They didn't release the whole thing all at once.)
At the top of your link is says 1998. At the bottom of the page it wonders about urine. Autopsy said her bladder was empty. The current autopsy report plainly states that urine covered the front of her clothes. This discussion from Dr. Wecht appears to be dated. He didn't have all of the info that we have now.
Someone tell me if I am incorrect.
Good finding though!
I'll check the others in a bit.