German-US supermarket billionaire, 64, who disappeared hiking on the Matterhorn and was declared dead is 'living with his 44-year-old mistress in Moscow'

A German billionaire who vanished under mysterious circumstances under Switzerland's iconic Matterhorn peak six years ago is suspected to be living with a Russian mistress in Moscow, an investigation has claimed.

German-American retail tycoon Karl-Erivan Haub, then 58, was training for a ski mountaineering race when he disappeared in April 2018 in Zermatt, Switzerland.

The billionaire businessman was last seen heading up the mountain in a lift one morning alone - something his trainer said was strange for a man who was typically very safety conscious and well-prepared - and never returned to his hotel. 

Authorities launched a six-day search which saw five helicopters and teams of alpine rescuers canvas the area, but his body was never found.

Haub - the former managing director andk part owner of German supermarket and retail giant Tengelmann Group - was declared dead by a Cologne court three years later, leaving behind a wife, two children and a company of some 75,000 employees.

His younger brother Christian swore in a courtroom in 2021 there was no indication the Alpinist, whose net worth was estimated at £5.2 billion, remained alive.

But now a major investigation led by German broadcaster RTL claims to have identified Haub in Moscow - and believes the tycoon is there with a much younger mistress named Veronika Ermilova.

Christian is now subject to an investigation by the Cologne prosecutor's office on suspicion of making false statements under oath, RTL reported. 

Christian assumed control of the Tengelmann Group after his brother's disappearance, and claimed to have commissioned a security service to investigate the 'rumours' he was still alive.

His lawyer, Mark Binz, told German newspaper Die Zeit: 'Of course there is nothing to the accusation.' 

Retail mogul Haub, who would now be aged 64, is alleged to have called Ermilova's phone 13 times in the three days before he vanished in 2018, according to the probe by RTL and media outlet Stern. 

The calls were substantial - one lasting more than an hour - leading to suspicions he was plotting to fake his death with help from Moscow and Ermilova. 

The investigation found that Ermilova, 44, ran an 'inconspicuous' event agency in St. Petersburg, which organised skiing, hiking and climbing excursions for outdoor enthusiasts - but she is also suspected of being involved with Russia's FSB security service. 

An investigation by Tengelmann later revealed that Haub's life was closely intertwined with the enigmatic Ermilova, who is believed to be some twenty years Haub's junior and was described as 'a slim, athletic woman with shoulder-length brown hair, dark eyes, and open smile'.

Investigators suggested that she 'may work for the Russian domestic secret service FSB', although stressed this 'cannot be proven'.

'What can be proven, however, is that she is always in the same places at the same time as Karl-Erivan Haub,' said the report.

'In July 2008, both were in Moscow and Sochi within a few days... In May 2009, both travelled on the same night train from Moscow to St Petersburg, in separate compartments. The trips were booked at the same time and by the same person.

'Strange too: [Ermilova] came to Moscow the day before just to take the train back home.

'Further overlaps of short trips by Haub and [Ermilova] can be found for stays in Omsk (2010), Sochi (2011), Baku (2014) and Moscow (2015, 2017).'

The report states: 'It is not clear why these alleged meetings took place. It doesn't sound like a love vacation.'

RTL journalist Liv von Boetticher speculated that Haub's disappearance in Switzerland and alleged appearances in Russia may have come as the result of shady business dealings.

'Karl-Erivan Haub is known to have done business with questionable people in the Russian economy,' she claimed. 

'Our assumption is that business with Russia or with Russian business partners could have got Karl-Erivan in trouble in the West.'

As well as calling Ermilova, Haub is also understood to have dialled Russian banker Andrey Suzdaltsev in both Russia and Geneva shortly before he died, the RTL and Stern investigation claimed. 

Another of Haub's Russian business partners included notorious self-confessed fraudster Sergey Grishin - known as the 'Scarface Oligarch'.

Grishin made headlines in the UK and US after being selling his $14.7 million home in Montecito, California, to none other than Prince Harry and Meghan Markle in 2020. 

Another co-owner of RosEvroBank, the Russian oligarch had bought the property with a seven-acre site, pool, tennis court, guest quarters and stunning main house, in 2009.

His nickname Scarface derived from his ownership of another Californian mansion where the 1983 Al Pacino movie of the same name was filmed.

Grishin was reported to have died from a long illness last year, although no evidence of his funeral has ever emerged.

RTL journalist Boetticher also speculated in an interview with Die Welt that Haub may have actually been working for the Russians. 

'He could have been acting as a kind of influence agent for Russia in Germany... It's not about an agent with a floppy hat and a trench coat or a James Bond, but about influence on politics and the economy.

'(His disappearance came) at a time when Tengelmann was doing pretty badly… and was expanding into Russia with the Obi DIY chain, for example.'

The journalist said: 'I am sure it was not a skiing accident, but a staged escape.'

The exact method used by Haub to conduct his alleged escape is not known. 

Some believe he skied through the Alps and descended into Italy, but there is no trace of his whereabouts after he set out on a solo ski tour in April 2018.