When Ichabod is performing an autopsy on the widow, who has been dead for at least a week, blood spits out of a cut he has made. Duh! Does he not realise that dead blood congeals in a few hours, let alone a few days??

I also mind at one stage he says all the beheadings had been done with a blade that would cauterize the wound, causing it not to bleed. So when Katrina's father is beheaded, why does he spurt blood?