The subject of canine trackers vs. visual trackers came up again a couple days ago. Once again the conversation developed as an either-or proposition.
There are a number of ways to cross a linear danger area, the term we used to describe an area of vulnerability for patrolling operators.
You can often tell the physical condition of a subject with regard to intoxicants or medical condition.
When it comes to suspect identification, footwear impression evidence (as much as other facets of tracking) is just as easily articulated, just as admissible, as other forensic evidence.
Your average street cop can tell the difference at a glance between .38 special brass and .45 brass, right? To the trained and even moderately educated eye, the contrast is obvious.