Sierra was last seen on the morning of Friday, 03/16/12 by her mother as she was getting ready for school. Sierra attends Sobrato HS in Morgan Hill, CA. A school friend stated she communicated with Sierra via text message on Friday 3/16/12 at approximately 0711 hours to meet before class started to discuss homework. Sierra never made that meeting. Sierra also did not board the school bus she takes everyday which picks her up at 0735 hrs. Sierra was also absent from school all day, Friday 3/16/12. Many of her friends have been contacted by telephone and on Facebook to notify them Sierra has been reported as a missing person. Sierra has never been a run away before and has not had any recent events in her life that would indicate she wanted to leave voluntarily. Sierra grew up in the city of Fremont, California, where she attended grade schools and some high school prior to moving to Morgan Hill, California. Friends and family from the Fremont area have also been notified Sierra is missing, as well as Fremont Police Dept.