Has anyone seen or spoken to Tanner Pratt of late?

I was on my way to the post office when I first heard it, a very loud murmuration of strings. It was some kind of classical composition though I do not know what. I paused and tilted my head and noticed that it seemed to be coming from Tanner Pratt’s house on Washington Avenue.

I walked up to the porch and noticed many months and unopened pieces of mail and magazines like The Atlantic and Scientific American piled up. I did not want to alarm the Question Mark Police unless it was necessary as they seem to have their hands full. But does anyone know the last time they saw Tanner Pratt?