On Sunday, a car and body were found in a California lake near where 16-year-old Kiely Rodni went missing.
On Monday, officials said the body was "likely" Rodni's.
The group Adventures with Purpose tweeted it found the car 14 feet below Lake Prosser’s surface, about 35 miles west of Reno, Nevada.
Rodni was reported missing on Aug. 6, after she attended a party with 200-300 others.
She was last seen at the Prosser Family Campground in Nevada County, California.
Since she went missing, officials have received over 1,800 tips.
Officials also formed a task force to help search for her.