The group were meant to meet up with friends to camp overnight in a nature park in the Northern Territory, but never showed up.
The soldier, who is assigned to the 1st Cavalry Division Sustainment Brigade, has not been seen since Monday.
Ricardas Puisys, 35, disappeared in September 2015 without a trace, leading to a major search and murder inquiry.
Rivera went missing on Wednesday night.
Authorities believe 33-year-old Rivera drowned in Lake Piru in southern California. A search has been underway to locate her since her son was found alone in a rented boat on Wednesday.
After going missing on Wednesday night, the search for Naya Rivera has shifted from a rescue mission to a recovery mission.
The mayor's cell phone signal was reported to have been last detected in the Sungbuk neighborhood of Seoul.
The Ventura County Sheriff's Department (VCSD) said it responded to a report of a toddler alone on a rented boat on the lake on Wednesday.
He's already in prison for an unrelated matter.
The suspect is currently in jail for a sexual offense but is believed to have been near the McCann family at the time of Madeleine's disappearance.
The search for Maeve Kennedy McKean and her son Gideon has turned from a rescue to recovery on Friday, as her husband and other Kennedy family members remember the missing pair.
Barbara Marincic, 83, was spotted in a cane field by crew members of an RACQ Central Queensland rescue helicopter just before 2 p.m. on Monday—after about four days missing from her home.
The 26-year-old student was found in "surprisingly good spirits," according to the Queensland Ambulance Service who were at the scene.
"After all these years he finally got home and we're just so excited we were able to help," a volunteer at Saving Hope animal rescue said after the dog was reunited with its original owner.
A massive search was launched involving helicopters from the Army National Guard and the U.S. Coast Guard.
The human remains belonged to 66-year-old Steven Mark Brashear, authorities said.
An Arizona mom was reported missing on Saturday, while camping, during a three-day catamaran tour in Belize.
Paula Beth James, 68, was rescued after her Toyota 4Runner was spotted by a helicopter in Butte Meadows, California.
Sade Subbs was reported missing after last being seen on January 9 at 10 p.m. in the area of Lake Jackson Circle in Apopka, Florida.
Tamra McBeath-Riley, 52, was rescued after she and two companions became stranded in the Australian outback. Claire Hockridge and Phu Tran are still missing.
"He used to say his gills were drying up whenever he was away from the water for too long. We take small comfort in knowing that he will never have to feel that again," relatives wrote.
Chyanne Thomas, an employee of the U.S. Postal Service in Vista, California, became a hero twice over when she helped return a pair of missing children to their homes in the space of two weeks.
Carl Stanley Ross Sr., 62, was found deceased on Monday morning, two days after being reported missing. He was last seen during a concert at Oregon Zoo. The investigation continues.
Whether or not the lake is really haunted, it's known as a deadly tourist location.
The 29-year-old has been living in Pyongyang since 2018 and is one of the few foreigners studying at the Kim Il Sung University.
Many of those aboard were teachers traveling to collect their salaries, a local mayor said.
Yvonne Longmire, 58, used another man—Maurice Ford, 22—to pose as her son to steal cash, police allege.
Authorities in the western Mexican state of Michoacan discovered the bodies, believed to be officers who had gone missing a week ago.