Earlier in the week, a search team found tire tracks, broken glass and Heichel's license plate on Larch Mountain, where they would later find her body.
Whitney Heichel's family said that in spite of their profound loss, the support they had received from their community has convinced them that there are "many good people."
"The loving concern from ones that didn't even know Whitney or her family has deeply touched our hearts," Heichel's family said in a statement. "The kind expressions, and support from perfect strangers has confirmed to us that there is much good in people. ... And though, while this event in our lives is tragic, we saw the positive effects it has had on this community."
Holt is scheduled to be arraigned at Clackamas County Court on murder charges Monday afternoon.
To learn more about Whitney Heichel or to find out how to make a donation to her family, visit Findwhitneyheichel.com.
Additional reporting by ABC News' Alyssa Newcomb and Sydney Lupkin.