Ten years after his daughter Elly Warren was raped and murdered in Mozambique, her father, Paul Warren, has shared an account of what he believes was a supernatural encounter.

Warren, who has spent the past decade seeking justice for his daughter, described an incident in which he felt a shiver and heard his keys jingling at his front door. He was alone in his home, and after calling out and receiving no answer, he investigated. He recounted this experience on The Trial Australia podcast.

"All of a sudden it popped into my head just to say, 'Elly, is that you or are you here?'" Warren told the podcast. "As soon as I said that... two of Elly's pictures flew off the table behind me... They didn't drop down on the floor. They ended up in the middle of the room."

He noted that one of the picture frames had broken glass. Warren, an engineer, initially dismissed a clairvoyant's suggestion that Elly would show him she was still around. However, following this incident, he came to believe his daughter had found a way to communicate with him.

Elly Warren, 20, was on a scuba-diving trip in Tofo Beach, Mozambique, and was four days away from returning to Australia when she disappeared on November 8, 2016. Her body was found by a local fisherman near a toilet block the following morning. The murder remains unsolved.

Warren has extensively investigated his daughter's death, alleging a cover-up by authorities in Mozambique and at home. He has documented his efforts in his book, "Hunting Elly's Killer."

He stated that prior to the incident in question, nothing had ever fallen from the table where the pictures were displayed in his 20 years of living in his current home. "And after that day, I've had nothing, no pictures, nothing ever fall on the floor," he said. He believes this occurrence, happening when he specifically called out to his daughter, was a sign.

Warren has stated his intention in writing the book is to prevent other families from experiencing similar struggles with the justice system. He expressed his certainty that there is more to life after death, a topic he often debated with his daughter, who he described as intelligent and skeptical about the afterlife.

"What I think is that there's a form of energy that leaves the body once we die. So we're still alive. We're not fully dead," Warren said. "And I believe that now. I believe that there's more to life after we die, but unfortunately we're never going to find out until that happens."