Now, I personally saw this gait once, in a guy who burned in a tank during WWII. He ended up with the damage to peroneal nerve. But it was one- sided, the BG clearly has weakness of right side, but some on the left one, too. So, not a trauma, likely, but neuropathy.
Here are common causes, from Wiki.
Conditions associated with a steppage gait
(I am fantacizing, probably, but Charcot-Marie-Tooth is a genetic mutation on Chromosome 17. What if they isolated his DNA and found this mutation? This would rule out many people. Something tells me they have the DNA, and the DNA is telling in a few ways).
Too fantastic, right? But here is an interesting part of it, the disease “can cause difficulty chewing, swallowing, and speaking (due to atrophy of
vocal cords)”.
Now the perp’s voice is coarse as if he is a chronic smoker, but I also wondered it he has paralysis of at least one vocal cord.
P.S. Also, if his Right leg is weaker, how about his Right arm? Anyone local whose right-handed handshake is weaker than the left one?
And what did people say about his eye being crossed? If the sketch is not artistic liberty, his R eye looks slightly to the side and down. 3D nerve palsy?