Analysis by a forensic dentist for downspout (Sample 140) from which DNA was obtained for the study. His quotes are below:
The image below is puzzling to me. The red arrows denote punctures by cone shaped teeth.
The blue arrows indicate drag marks extending from smaller punctures...but the direction of the drag marks seems wrong to me.
The punctures go from out to in on this surface but at the red arrow the metal has been pulled out (or pushed out from inside).
This is a feature I have not seen before in bite marks on inanimate objects. This, however, is my first analysis of a downspout.
Bottom line, I do not know what made these marks.
Another puzzling feature is seen at the red arrow in the image below.