User blog comment:AED/Footprints in the Villa/@comment-78.62.79.51-20110623170016

It's not Ezios blood, because when you turn on eagle vision after you exit the van, there are no footprints!!!! They appear after finshing the first segment of memory in sanctuary. Maybe it's something left in development process, like Masun is red, because it was intended to be a mission where altair needed to kill him.