"I am not an investigator, I admit. It is difficult to tell how many people were here - you see, these are all the same kind of footprint. At least, I can tell there are at minimum, three different sizes. It does seem to suggest a uniform."

She moves on to the broken wire fence. It is difficult to make anything in particular of this clue and it is, indeed, expected, but...

"Does it look to you like this was a moving vehicle impact?"

If it were a large truck driving through, she would expect the fence to be thrown forwards and the posts clearly angled in the direction of the force. Instead, it seems more as if it were... crushed.