In Smit's testimony before Carnes he says that the Hi-Tec logo at the crime scene matches Helgoth's boots down to the circular trademark. I took another look at the crime scene photo and there is a circular mark on the right near the "H." Because it's deep and regular it does look like it could be part of the boot.

I looked at a bunch of Hi-Tec logos on boots courtesy of ebay and while some of them have a symbol near the "H," they are closer to it and larger than the mark in the crime scene photo.

I know the police said Helgoth's boots didn't match and I've wondered if they could tell because the logos weren't a match.