Uncle Ghost Picture

Sullie sent us this ectoplasm ghost picture...could it be their uncle? Part of an outline has been drawn in by pencil on the ghost picture.

"I am definitely not a believer in ghosts, but this picture taken by my sister, in my uncles home a few weeks after his death, really has me wondering. She outlined the mist form in the picture, and this form looks very much like my uncle. I was not there when the picture was taken so I don't know if anyone was smoking when it was taken. It does not look like smoke to me, but I'm not an expert. What do you think this is?"