Mary Alice Brandon born 1901 in Biloxi MS put in a lunatic asylum by her family because she had visions. 1920 she was turned by an "unknown vampire" in order to protect her from tracker James. It is unknown whether she was not only tracked by Demetri or also turned by him. Demetri is the best tracker of all time.
Original source image found: http://images.google.com/imgres?imgurl=http://images-1.redbubble.net/img/art/size:large/view:main/2408614-2-my-inner-demons.jpg&imgrefurl=http://www.redbubble.com/people/lestat/art/2408614-2-my-inner-demons&usg=__0eeksXLehCsJ5pQ_E7jzpZSYaW4=&h=365&w=550&sz=34&hl=en&start=1&sig2=CBXP-EBmhP6ISz2_NaSRrQ&um=1&tbnid=OfZeAn2wbCx3aM:&tbnh=88&tbnw=133&prev=/images%3Fq%3Ddark%2Bcell%26ndsp%3D18%26hl%3Den%26sa%3DN%26um%3D1&ei=0Uu2SrnAEIvEMLqenNsO
Alice and Demetri source image: http://www.shockya.com/news/wp-content/uploads/demetri_alice_cullen_new_moon_movie.jpg
Historical US Insane Asylum Listings by state found: http://www.rootsweb.ancestry.com/~asylums/
More information on the Fenwick Sanatarium: http://www.vermilionhistorical.com/features/Topics/fenwick_sanitarium.htm
It is not known or said by Stephenie Meyer exactly what asylum Alice was put. I researched the internet and found this one New Orleans and it would seem possible she would be put there since Biloxi is only 1 1/2 hour away. It is also not said who exactly turned Alice. Nor is it mentioned that Demetri tracked her. This is just my take on it. Hope you enjoy the picture!