Okay clearly he's been through something traumatic. He looks like an accident victim.
He's walking with a cane, no facial hair, teeth look totally different and he's wearing a hat probably had to have his head and all facial hair shaved due to the accident.
Someone mentioned a car or motorcycle accident which would account for all of the things I mentioned.
He looks like he's in pain in the pictures above.
I wish Shemar a speedy recovery.