Yesterday afternoon, the body of Misty Upham was found in a ravine in Seattle, Washington.
The actress, best known for roles in Frozen River and Modern Family, had been missing since October 5 and, tragically, her family's worst fears have now been realized.
Along with many other celebrities, Juliette Lewis (who appeared opposite Upham in August: Osage County), mourned the loss of her friend on Instagram.
"Misty Upham survived many things that many don't early on in life. She fought for the voiceless fiercely," Lewis wrote. "She understood suffering and the deepest pain. She had a presence everyone saw and felt. It is this presence that will continue. Out of the dark space in which her light got dimmed.
"I will remember her as tuff. Wise. Funny. Spiritual. And hopeful. This is another great reminder to call and check on someone when you think to. Not when its too late. RIPMistyUpham."
The cause of Upham's death is yet to be determined, but filmmaker Tracy Rector - a close friend of the family - says relatives "do not feel Misty Upham committed suicide.”
Her body was found "at the bottom of a 150 [ft.] embankment near the White River,” according to local authorities.
Lewis then Tweeted about the unusual circumstances surrounding her late friend's death, claiming Upham told her she "felt she could be murdered… because she was vocal," further explaining:
"Misty spoke out alot against injustices within Native community. And had known enemies. Police must do an investigation."
Lewis ended her message with the hashtag #ThisIsNOTaSUICIDE."
Rector, meanwhile, also told The Hollywood Reporter that police were not helpful in finding the missing Native American star.
"First and foremost, the family wants everyone to know that the Auburn police did not help with this situation at all," he says. "They refused to help.
"When she disappeared on Oct. 5, the family knew something was seriously wrong - it was out of character for her to be gone so long without being in touch - and they repeatedly went to the police, who insisted there was no cause for concern."