Where The Hell Did Our Tree Go?

I came home, Kentucky Fried Chicken in hand, on Tuesday to see something missing in our front yard.  We had two trees, and the one closer to the street is gone, with only its scarred stump and shards of wood shavings left in its place.  I asked my folks, who presumably were at home all day and thus noticed this chopping down of our tree, about it.  They didn't call for it to be removed, nor did they stop it, and they didn't even open the front door to ask what was going on.  They just observed this tree, which has been there my whole life, being cut down and hauled away.

No idea they were doing this.  Now, I have read the city newsletter, published four times a year, where some trees in town had to be either treated for, um, whatever disease is going through the neighborhood or, failing that, chopped down.  When I was mowing the lawn this year, I noticed a small medallion hanging from a nail nailed into the bark of this tree with some numbers on it.  I thought that meant that this tree had been treated.  Maybe that meant that the tree was slated for removal, even though I wonder, if that is what that is, why it took till Christmastime to do take the tree away.

Just in case, I should call the city to make sure they're the ones who did it.  Then again, my folks weren't told they had to pay for the tree, so it's probably legit, though strange in how the city went about doing it.