Extensive searches online return no news publications or active missing persons cases for this name.
Only source of information: https://www.berkshireeagle.com/stories/family-seeks-missing-teen-last-seen-in-great-barrington,432403
Sixteen-year-old Emily Mills was last seen at 12:05pm on January 25, 2012 at Monument Mountain High School in Great Barrington, Massachusetts. According to her mother Denise Mills, she took a bus to Pittsfield. Emily had been staying in foster care in Otis since August 2011 due to issues with drugs and other associations in her hometown of Auburn, Massachusetts.
Emily Mills was last seen with braces and ear, nose and belly button piercings. She was 5'9" with blue eyes and brown hair at the time of her disappearance.