True, the sketch is not highly "modeled" and/or shaded to render lifelike contours, but as someone who has been drawing her entire life, it does capture some very strong differentiating features to compare for likeness:
Facial shape: square (not oval, heart-shaped, elongated, etc.)
Hair: Close cropped, slightly less volume on top
Eyes: Small, dark, deep-set, hooded (Brown)
Cheeks: High, flat (no dark circles or under eye sag)
Eyebrows: Not prominent, not overly hairy, slight arch
Ears: both very distinctive and protruding. Left - rounded and smooth, Right - somewhat uniquely pointed (Think Stephen Colbert...)
Bridge: Slightly drooped or protruding
Nose: Wide, thin nostrils, very round, bulbous tip
Lips: Deep clef between nose and upper lip, thin lips
Chin/Jaw: Small, wide, relatively flat (no deep shadow rendered under lower lip), skin fold suggesting "double-chin" or slightly overweight
Facial Hair: Heavy stubble, thick, dark
Granted, composite sketches certainly vary greatly both in terms of artist accuracy/ability, as well as the person's memory/description, but I suspect there was some discussion and agreement on all the above selections chosen for this composite.
I am not choosing to debate the truthfulness one way or the other, just pointing out some key features for those that are looking at images and making comparisons.
