British former head designer at Rolls-Royce, 74, is found 'stabbed to death on his own doorstep' at his £3million German mansion - with police launching manhunt for his killer after the victim's wife 'jumps over wall to escape the attacker'

A British former head designer at Rolls-Royce has been found dead on his own doorstep at his £3million mansion after being stabbed.

Ian Cameron, 74, was discovered at his German home on Friday evening, with local media reporting he had been stabbed by a man.

It took place at the house in Herrsching at Lake Ammersee in Upper Bavaria, where extensive searches have taken place for escape routes and evidence. 

The CCTV over the garages where his high value vehicles were kept had the power cables cut, The Sun reported.

Ian Cameron, 74, was discovered at his German home on Friday evening, with local media reporting he had been stabbed by a man

Ian Cameron, 74, was discovered at his German home on Friday evening, with local media reporting he had been stabbed by a man

It took place at the house in Herrsching am Ammersee (pictured) in Upper Bavaria, where extensive searches have taken place for escape routes and evidence

It took place at the house in Herrsching am Ammersee (pictured) in Upper Bavaria, where extensive searches have taken place for escape routes and evidence

Verena Kloos managed to get to their neighbour's house and phone the police

Verena Kloos managed to get to their neighbour's house and phone the police

Police have launched a manhunt for his killer after Mr Cameron's wife jumped over a wall to escape.

Verena Kloos managed to get to their neighbour's house and phone the police.

Mr Cameron was a vintage car expert who retired from Rolls-Royce in 2013.

This was after 20 years at the firm, working on the design of cars such as the 3 Series, Z8, Phantom, and Ghost.

Police labelled it a 'violent crime' and said the attacker fled on foot from the house.

Search teams are using dogs and a helicopter to track him down.

But an officer told The Sun it is 'extremely rare' that a burglar who prepares enough to disable CCTV then 'stabs and kills' a person.

The suspect is reported to be 180cm to 190cm tall, with light trousers and a dark blue hoodie, carrying a red rucksack and yellow-green gloves.