EXCLUSIVE: The Last Promise – Inside the Final Text Message from Missing FIFO Worker Bill Carter That Haunts Investigators

Perth, Western Australia – December 14, 2025

In a development that has deepened the mystery surrounding the disappearance of 25-year-old William “Bill” Patrick Carter, sources close to the investigation reveal that search teams have zeroed in on one seemingly innocuous text message as a pivotal clue. Sent less than an hour before his mother dropped him at Perth Airport, the message read simply: “I’ll check in once I’m through.”

He never did.

That unfulfilled promise – calm, routine, and utterly ordinary – has now become a haunting focal point in the narrative of Carter’s vanishing, underscoring how abruptly a reliable young man’s life appears to have unraveled.

According to multiple sources familiar with the police briefings, the message was sent from Carter’s phone at approximately 11:52 am on December 6 while he and his mother were en route from their breakfast in Kelmscott to Perth Airport Terminal 3. It is understood to have been addressed to a close family member – most likely his sister or partner Janae Williamson – as part of the casual check-ins that were routine whenever Bill returned to his FIFO swing.

“Nothing in the wording suggested distress,” one source told this publication on condition of anonymity. “It was the kind of text he sent every single time he flew back to site. But this time, the confirmation never came. That silence is what makes it stand out so starkly now.”

Carter was dropped off at 12:40 pm appearing upbeat. His mother captured the now-iconic selfie at the sister’s specific request: proof that Bill was safe and on his way. Less than 20 minutes earlier, he had typed those eight words that would become his last known communication with loved ones.

By 1:45 pm his phone last pinged near the airport. By 2:10 pm he was in a taxi heading not north to the Pilbara, but west to Trigg Beach. By 2:40 pm he was spotted walking alone near the surf life saving club, small backpack slung over one shoulder, staring out at the Indian Ocean. Then – nothing.

Investigators and family members have repeatedly stressed that Carter’s disappearance shows no signs of planning. No note, no goodbye, no angry words, no withdrawal of cash, or sudden financial activity. His luggage remained at the Fenner Dunlop camp near Karratha. Colleagues still describe his failure to appear for the swing as “unprecedented,” recalling his earlier remark: “If I ever miss a flight, something’s seriously wrong.”

Yet the text message adds a poignant layer. To those analyzing the digital timeline, it represents the final thread of normalcy – the last moment Bill Carter sounded exactly like the dependable, considerate person everyone knew. The fact that he intended to “check in once through” security, but never followed through, suggests the decision not to board crystallized in the roughly 90 minutes between sending the message and reaching the terminal.

Mental health experts consulted by police have noted this pattern is not uncommon in situational crises: a person can appear composed and even optimistic right up to the instant an internal tipping point is reached. Carter had ceased his prescribed anti-anxiety medication five months earlier under medical supervision, but family believe recent personal stressors may have converged that morning.

His sister, who has quietly taken over much of the public liaison and grassroots searching, reportedly breaks down when discussing the message. “He always checked in,” she has told close friends. “Always. That was Bill.” She has continued phoning hospitals, shelters, hostels, and transport hubs daily, clinging to the hope that her brother simply needed space and will surface when ready.

WA Police have confirmed they are treating the text as “critical context” and have subpoenaed full phone records to map any other outgoing or incoming communications in those crucial 90 minutes at the airport. Detectives are particularly interested in whether Carter received a message or call that may have altered his state of mind.

Eight days in, the search remains intensive but fruitless. Drones, trail bikes, SES volunteers, and PolAir have swept the Trigg dunes, Scarborough foreshore, and Hillarys marina with no trace. Marine units continue daily coastal patrols amid fears the ocean may hold answers no one wants to contemplate.

The resources industry, already grappling with mental health stigma, has watched the case closely. Support services such as Lifeline (13 11 14) and Beyond Blue (1300 22 4636) have reported increased calls from FIFO workers since Carter’s story broke.

For the family, that single line – “I’ll check in once I’m through” – has become both a lifeline and a torment. It proves he started the day intending to return to work, to life, to them. Somewhere between sending it and reaching the gate, something changed.

As Jenny O’Byrne told reporters yesterday through tears: “He promised he’d check in. My boy always keeps his promises. So he’s still out there somewhere, waiting for us to find him.”

Police urge anyone who was at Terminal 3 between 12:40 pm and 2:10 pm on December 6, or who has dashcam vision along the airport-to-Trigg route, to come forward. Even the smallest detail could explain why a routine promise became the last words a family ever heard from Bill Carter say.

Description: Caucasian male, 174 cm, slim build, brown hair, blue eyes, last seen wearing black t-shirt, shorts, black-and-white sneakers, carrying small black backpack.

Contact Crime Stoppers 1800 333 000 or Police 131 444.