That just means that his post from 2015 was the last “public” post he made. Everything after that is only visible to his Facebook “friends” so you’ll only be able to see those posts if you are friends with him. From the look of his wife’s page, they’ve been having issues lately.
If the Facebook page is his, and it’s his anniversary, and his wife says they’ve been having problems, it sounds like this is a domestic gone atomic.
Do you have a link to the wife’s page?