Investigators searching for a California 16-year-old who vanished from a graduation party nearly two weeks ago are frustrated because many of the young people who were there on August 6 won’t talk with police.

Kiely Rodni attended the party with 200-300 other people near the Prosser Family Campground in Truckee, as CrimeOnline previously reported. She texted her mother shortly after midnight to say she was headed home, then called a friend — who was also at the party — a few minutes later to say good-bye.

She hasn’t been seen or heard from since.

“People aren’t talking to us,” Placer County Sheriff’s Office public information officer Angela Musallam told The New York Post Thursday.

“A lot of people from the party may be in college or may be just about to start college and they’re afraid they will ruin their future if they say something,” she said.

Officials have repeatedly said they have no intention of prosecuting anyone for illegal drugs or underage drinking.

“While we don’t condone that illegal activity, for the purposes of this search and investigation, that is not our priority. We don’t want to take partygoers to jail for drugs or underage drinking — we want to find Kiely,” Musallam said.

Earlier this week, Lt. Joshua Barnhart acknowledged “an isolated incident we were able to get past” in which certain adults were advising teens and young adults not to speak with investigators. It’s not clear if something dramatic changed between that news conference on Tuesday and when Musallam spoke with the Post on Thursday.

Investigators have photos of Rodni at the party, but no one has come forward to say they saw her leave. Musallam told the Post the investigators think that someone has an idea where Rodni may have been heading.

“We ask people who know something, do you want this to weigh on your conscience?” she said. “You will have to live for the rest of your life knowing a family won’t have closure about where their daughter is.”

“Just tell us what you know. Her family has suffered enough,” Musallam pleaded.

Musallam also told the Post that detectives are looking into reports that there were older men at the party, but, she said, “the majority of the partygoers were minors and young adults.

Detectives don’t even have a theory of what happened to Rodni because they have so little information about where she was heading when she left. Her silver Honda CRV is also still missing.

For the latest true crime and justice news, subscribe to the ‘Crime Stories with Nancy Grace’ podcast.

[Featured image: Kiely Rodni/Placer County Sheriff’s Office]