User blog comment:NotCrazyZora/Bloody Mary's status/@comment-6045649-20140709173114

Concrete facts state Mary died in that encounter. Telltale put much emphasis on her death. If we listed her as unknown, we would be speculating she escaped and ran off. Speculation is not allowed as everyone should know.

Also, using that Kenny example is flawed. Back in the day we had no evidence Kenny would return and it looked unlikely he would considering he was stuck in a herd. If we listed Kenny as unknown back then, it would have also been speculating...which is why his status was changed as dead.

If Mary comes back somehow, so be it. But as of now, everything points to her being dead.