Between the ages of 8 and 40, I entered numerous under-construction homes, either with friends as a kid, or, solo as a kid (plus solo later in life, too). My wife and I even explored a few when we were dating and 1st married. Why? Just to check them out. And to smell the fresh wood smell. One of my favorite scents is "house being built, smell".
Over time, a few visits over days or weeks, you can see some real progress on the house. I find that sh*t fascinating. Always have.
To this day I point out to my family, houses that have had people living in them for decades, that I can remember as far back as the excavators clearing the lots and digging the foundation holes for them, in the 1970s. I entered those homes as soon as there was something to enter. At age 8-plus.....I rode my bike all over town, climbed into and out of foundations, entered framed houses, went up to 2nd floors as soon as safe-looking stairs were in, etc. Never stole a thing.
Today I can still show you every house that I did that to.
So why did he do it? Maybe he was "me".
He may very well be a victim of the disastrous "see something, say something" policies that killed innocent curiosity and true freedom of movement in this country......I used to walk freely in and out of every terminal at Logan, and take pictures of planes.....and took pictures of trains at North and South Stations, as well as pretty much the whole MBTA system.....try doing any of THAT today.....and zero sh*ts were given. With this case, it looks like a couple of good old boys decided to "see probably nothing, do something" instead of leaving this guy alone.
My bet is the guy was just checking out the progress on the house.