Pretty sure it was Korean, maybe Japanese as well. I do remember that the girl was blind, and that her mother had special powers. Through the mother's powers, the blind girl is able to see or something. I distinctly remember that the blind girl was shunned by society and was burned with a plastic bag over her head.

Fast forward a bit and the spirit of the blind girl posses another girl who is being shunned by society(this info may not be correct...). The possesed girl kills the other mean girls in the school one by one. They then consult a spirit specialist or whatever and they try to enter the memory of the spirit. The spirit's power was so strong however that the medium was almost killed while in the memory.

The ending scene was where the officer(or detective) was killed by the possessed girl in a school.

Those are the details I remmember. Googled a bit and it doesn't feel like Possessed (2009 korean film).

EDIT: Found it. Bunshinsaba. Ouija Board is the english title.