I have to admit.. the fact that there is no genetic material (hair, blood, fingerprints) etc linking Garland to the scene was a bit of a bombshell to me, especially considering the cuts scene on his head/face. Unless there is more to come, besides the shoeprint that can loosely be tied to him (although you could argue that it doesn't mean much as hundreds or thousands of the same type of shoes were probably sold), it scares me to think what this could mean.
Hopefully the overwhelming evidence from the farm (including the aerial photo) proves beyond a reasonable doubt that DG committed this crime...