The blood patterns represent human wounds, so people think it could possibly be Jesus.
Experiments concluded that the cloth could have dated back to the first century A.D.
The edges were burned and people say it could be from the "flash of light" that comes with Jesus.
The blood darkens the imprint of a human mans body.
The places where the body was actually wounded, are the same places that showed on the cloth.
The carbon dating dates do not line up/ match up
The sheet does not leave room for the top of Jesus head
People think the shroud is just a piece of art
People think this was "painted" during the middle ages.
People question the fact as to how it ended up where it did end up.
My opinion- I do not think the Shroud of Turin is real. It may be, but the amount of evidence for this type of finding should be to the point where there should be no question as to whether or not it is real. And it still leaves questions in my mind as to whether or not it is real.