(CNN) The FBI is appealing for photos or video from Yellowstone National Park that may show two children missing from Rexburg, Idaho, since September.

Tylee Ryan, 17, has not been seen since she visited the park September 8 with her brother Joshua "J.J." Vallow, 7, mother Lori Vallow and uncle Alex Cox, according to authorities. Joshua was last seen at an Arizona school later that month.

A new booking photo shows Lori Vallow after her return to Idaho on Thursday.

Lori Vallow, 46, faces multiple charges, including two felony counts of desertion and nonsupport of children, according to a criminal complaint filed with an Idaho court.

The FBI's Salt Lake City field office, along with Rexburg Police, posted a request Thursday on Twitter for the public to submit images and footage from Yellowstone on September 8 that could include the Vallows or Cox.

The #FBI, @RexburgPolice are asking any visitors to @YellowstoneNPS on 9/8/19 submit multimedia that may show missing kids, JJ Vallow and Tylee Ryan, their mother Lori Vallow and uncle, Alex Cox. Photos/videos can be submitted online at https://t.co/8jl2wJCAza. pic.twitter.com/LyujbanGh6 — FBI Salt Lake City (@FBISaltLakeCity) March 5, 2020