Three-year-old Madeleine McCann's disappearance while on holiday with her parents in Portugal has baffled investigators for over ten years.
Last year, as the 10th anniversary of the little girl's missing persons case approached, many new developments and leads began to crop up. Investigators managed to finally identify a mysterious woman who was seen lurking around the property just hours before Madeleine vanished.
The nanny hired by the McCanns to look after their daughter also opened up to the public for the first time, and had some interesting things to disclose about the fateful night. She put some blame on the Portuguese police for not handling the case better. She claimed that they took 90 minutes to arrive to the scene and by that point the potential crime scene was contaminated by people going in and out of the apartment.
Turns out, she's not the only person who is suspicious of the officials involved in the case. In 2008, Kevin Halligen, a private detective hired to look into the case, was accused of misusing the funds allocated for the case. His firm was paid around $600,000 to locate Maddie, but the McCanns ended the contract after Halligen failed to go through with some parts of their agreement.
Halligen denied the accusations when he appeared in a Channel 5 documentary called The McCanns and The Conman. He claimed that the reports were a "gross distortion of what was actually happening."
"Trust me, I didn't so much as buy a new suit... The money, all of it, is fully accountable. It's provable," he added.
In 2012, Halligen was extradited to the United States where he faced charges for approximately $1.7 million fraud. He pleaded guilty in 2013, and was sentenced to 41 months in prison.
The former private detective was deported back to England, where he lived until his sudden and inexplicable death.
56-year-old Halligen was found dead at his home in Normany, Guildford, England. Adrian Gatton, director and journalist who previously made a documentary with Halligen, confirmed his death to the Press Association.
He also revealed that Halligen had been unwell, and was even taken to the hospital last week. He said that he believes the former private investigator's death was related to his alcoholism.
"There was blood around the house, probably caused by previous falls when he was either drunk or blacking out," he added. "His house was full of empty drink bottles. A lot of people wished him ill but his death is almost certainly related to alcoholism."
Surrey Police also released a statement following Halligen's death, providing very few details of what had transpired.
"We were called to an address in Cobbett Hill Road, Normandy, on Monday following a report of a man in his 50s having been taken unwell, who subsequently died," said a spokeswoman for Surrey Police.
At this point, it's unclear whether or not, Halligen's death was caused by his illness, alcoholism, or foul play, but police confirmed that it is "being treated as unexplained and a file will be passed to the coroner's office in due course."