Kaitlin Kenney was with a group of experienced rafters and was on her first trip down the river. Linnea Kenney said no one saw her daughter get up in the middle of the night, but the next morning the group realized she was missing and called dispatchers at the Grand Canyon with a satellite phone to report it.
"They did a thorough investigation and talked to all the people to try to get any clues, and of course to make sure there was no foul play," Linnea Kenney said. "No doubt in my mind there was no foul play. She was happy and laughing, and that's kind of how everyone remembers her little soul."
The last items Linnea Kenney received from her daughter were postcards from the Grand Canyon telling her that she was having a great time and that she felt safe, "and that it was the best thing she had ever done," Linnea Kenney said.
Any additional information or clues into Kaitlin Kenney's disappearance could help guide future search efforts, park spokeswoman Shannan Marcak said.