To my mind, it supports an acute mental health crisis and/or drug induced psychosis. Either is equally likely in a man of his age.
To me it sounds like paradoxical undressing.
Severe hypothermia can cause people to lose consciousness, and may result in death. But before losing consciousness, people suffering from hypothermia have been known to exhibit some bizarre behaviors that may be a last-ditch effort to survive.
www.livescience.com
“As strange as the terminal-burrowing behavior might seem, an act called "paradoxical undressing" is even more confounding. The term describes the behavior among many victims of extreme hypothermia of peeling off most or all of their clothing, increasing heat loss.
When rewarming the body of a hypothermic person with the body of another person,
first-aid experts often recommend that both the victim and the "rewarmer" be naked or barely dressed. This facilitates the transfer of heat from the warm person to the person with hypothermia.
But that recommendation, researchers believe, has nothing to do with paradoxical undressing. To shut down the loss of heat from the extremities, the body induces vasoconstriction, the reflexive contraction of blood vessels.
Over time, however, the muscles necessary for inducing vasoconstriction become exhausted and fail, causing warm blood to rush from the core to the extremities. This results in a kind of "hot flash" that makes victims of severe hypothermia — who are already confused and disoriented — feel as though they're burning up, so they remove their clothes, researchers have concluded.
Paradoxical undressing often occurs immediately before terminal burrowing. The researchers in Germany investigating hypothermia victims noted in their article that "the final position in which the bodies were found could only be reached by crawling on all fours or flat on the body, resulting in abrasions to the knees, elbows, etc. This crawling … happened after undressing, as there were abrasions to the skin but no damage to the corresponding parts of the removed clothing."