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Testimony or witness reports, police reports, and with the trail of evidence going down that direction. >> the trail of evidence, youd great with me, is just a trail. it by itself doesnt is a direction, right? in other words, whether its going right to left or left to right as youre looking at it, the places where things are found doesnt independently have a direction until you start pringing in what other people have said about how it happened, correct? >> correct. the reason for the arrow is m...