Of course!...............BUT:
This investigator was unable to determine if the door was forced by firefighters or was forced prior to the fire."[italics and bold mine]
Don't you think a simple question like, "Hey, guys, did you kick the door open", would have been a natural part of the investigation??!
Agreed - I would also think that the investigators would be familiar with the pattern on the bottom of a firefighter's boot. Maybe these guys fight so many fires that the details of any single fire become obscured in their memories. Still, I would at least ask the question.
WFTR
Bill