Denham Hitchcock returns to 7News Spotlight this Sunday, joining Michael Usher and Mylee Hogan in a story on Australian "Love Mules" - women lured into the crime of smuggling drugs across international borders.

One case includes Donna Nelson, recently profiled on Australian Story, sentenced to six years in prison in Japan.

It starts with a message. A charming stranger. A promise of love. And it ends in a foreign prison cell.

This Sunday 7NEWS Spotlight exposes the heartbreaking crime wave targeting some of Australia's most vulnerable – women looking for love, who are being manipulated into smuggling drugs across international borders.

In a global investigation spanning Brazil, Japan and Hong Kong, 7NEWS Spotlight's team of reporters Michael Usher, Mylee Hogan and Denham Hitchcock expose the cruel deception behind the so-called "Love Mules", women like Veronica Watson and Donna Nelson who were lured into romance scams so convincing they risked everything.

Grandmother of nine Veronica was arrested in December, with 1.5 kilograms of cocaine in her luggage, leaving Sao Paulo Airport. She's always maintained she was scammed by a man posing as a love interest.

"I trusted him," Veronica said through tears. "He said he loved me. I thought we were going to get married."

Donna's story is just as devastating. A mother of five and former federal political candidate, she believed she was flying to Japan to meet her fiancé. Instead, she was arrested with two kilograms of methamphetamine in her suitcase and sentenced to six years in a Japanese prison.

These women aren't just criminals. They're victims of a sophisticated and deeply manipulative scam, one that plays out over years, with thousands of messages, video calls, and even detailed wedding plans.

In this exclusive investigation, 7NEWS Spotlight tracks down the scammers behind the heartbreak. Going undercover, Denham Hitchcock follows the trail of the man known only as "Kelly" through the backstreets of Hong Kong, uncovering the bars he frequents and speaking to those who've seen him.

Denham Hitchcock said: "These online relationships were real, in both cases they went on for two and a half years. Messages and video calls. This is a new type of scam, insidious, evil and cruel.

"We're not just telling these women's stories; we're attempting to track down the people who destroyed their lives and show how it can happen to anyone."

In Sunday's 7News Spotlight Liam Bartlett meets Australia's ‘Iced Coffee Killer' - Jessica Wongso, released on parole in Indonesia last year after serving for 8 years in detention.

Almost a decade ago, Australian resident and former NSW Ambulance worker Jessica Wongso was convicted of brazenly and fatally poisoning her former best friend's iced coffee with cyanide in a busy Jakarta café.

It was January 6, 2016, and Wongso was catching up with Mirna Salihin at one of the city's classiest cafes for the first time in four years.

She'd taken the liberty of pre-ordering Salihin a drink. But seconds after she took her first sip, she began convulsing and foaming at the mouth. Just over an hour later, Salihin was dead.

Described as the most compelling murder mystery in Indonesian history, the case shocked Australia and sparked international headlines.

Now out of prison and granted a Judicial Review in the Indonesian Supreme Court having served only eight of a 20-year sentence, Wongso has bizarrely become a successful social influencer and is desperate to rewrite history.

In this major 7NEWS Spotlight exclusive, Wongso – who has always maintained her innocence – comes face-to-face with award-winning correspondent Liam Bartlett in her first ever tell-all interview.

Bartlett presses Wongso in the confronting sit-down on every aspect of the case, including accusations she was motivated by jealousy, her suspicious behaviour in the hours before the murder, her bizarre tendency to smile throughout the trial, and her thoughts on likelihood of acquittal.

"They still can't prove anything," Wongso tells 7NEWS Spotlight in the at times uncomfortable interview.

We also hear for the first time from the Australian woman who helped seal Wongso's fate. Former boss Kristie Carter sits down exclusively with Bartlett to reveal for the first and last time the ‘erratic' behaviours she witnessed in the lead up to the killing, and the trauma she and others endured from Wongso.

Liam Bartlett said: "There's something you just can't pin down about convicted murderer Jessica Wongso. Is she innocent as half the Indonesian population seem to think? Or is she – as those who are convinced of her guilt like to put it – completely mad?

"Either I'm sitting in front of a cold, calculated killer who murdered her best friend on the basis of simple jealousy, or a young woman who is a terrible victim of circumstance.

"It's a plot worthy of a soap opera. But now, nearly a decade on, a family still grieves the incomprehensible killing of a beautiful young woman by her one-time best friend, who continues to protest her innocence."

Award-winning broadcast journalist Liz Hayes sits down with Lauren Zonfrillo, the widow of beloved TV chef and MasterChef Australia judge, Jock Zonfrillo.

Airing on Seven and 7plus this Sunday at 8:00pm, it is the first time the mother of two has spoken publicly since her husband was found dead in a Melbourne hotel room in May 2023. His cause of death has never been released.

In a world-exclusive investigation, Liam Bartlett uncovers the dirty truth behind so-called clean, green electric vehicles & how China is getting away with causing a deadly environmental catastrophe.

Bruce McAvaney will sit down with champion teen sprinter Gout Gout ahead of his Maurie Plant Meet.

McAvaney is joined by Olympians Matt Shirvington, Raelene Boyle, and Cathy Freeman.

"[Gout] is just something else," Freeman tells McAvaney. "Watching him race, it's like he's been shot out of a cannon or something. He's quite extraordinary.

"He's probably smarter than I was at that age. He's quicker. But he's certainly got the world at his feet."

McAvaney added: "To think Gout was a cross-country official at what might turn out to be an Olympic Stadium says much about his ambition to compete at home in 2032. It's distant, yet so close."

He's the fastest man in Australia… on track to become the fastest man alive.

In case anyone missed it, in December last year the teenage sprinting phenomenon blasted onto the world stage when he broke the Australian 200m sprint record set by Peter Norman 56 years ago – at just a month shy of 17

The greatest-ever didn't run this fast, at his age. But Usain Bolt went on to set records still to be broken and was unbeaten across three Olympic Games – hence all the fuss about Gout Gout.

Going into the Aussie record books was incredible enough, but it was being faster than Bolt at just 16 that launched Gout into the athletics universe.

The comparisons are obvious. It's not just the times, there's also the technique and the way he wins, coming from the back of the field like a hurricane.

Gout's team have no doubt he's on the trajectory of greatness. His take-no-prisoners coach, Di Shepperd, says that it isn't a question of "might" but "when". Manager James Templeton echoes that sentiment, declaring there is no doubt that doubt Gout will be an Olympic finalist.