Phone data shows California family made numerous calls for help on fatal hike

Authorities were able to re-create the family's hiking path using data, including GPS locations and photos, from their phones

Authorities have released new phone data, including unsent text messages pleading for help, in the case of the young California family killed by extreme heat during a hike in a remote area of the Sierra Nevada mountains last August.

The new details surrounding the deaths of 45-year-old Jonathan Gerrish, his 35-year-old wife Ellen Chung, their one-year old daughter Aurelia Miju" Chung-Gerrish and their dog Oski, were released on Thursday by the Mariposa County Sheriff's Office, included family photos taken during the hike, text message and phone call attempts, and GPS locations.