A British student who died in Germany where he had attended a conference by a right-wing group was beaten to death, according to new evidence.
Jerry Duggan called his mother hours before his death
German authorities ruled that Jeremiah Duggan, 22, of Golders Green, north London, committed suicide after he was hit by two cars in Wiesbaden, in 2003.
But new evidence suggest he was battered to death with a blunt instrument, such as "a fist or a foot".
It also shows he suffered "defence wounds" to the hands and forearms.
Mr Duggan was in Germany for an anti-war conference run by the Schiller Institute, a right-wing group inspired by US political activist Lyndon LaRouche.
Hours before his death he called his mother claiming he was in "deep trouble" and that he "wanted out".
The evidence has been compiled by forensic experts who examined photographs, pathologist reports and other key documents in the case.
German prosecutors who examined the crash scene ruled there were no suspicious circumstances and no inquest was held.
But the family's findings suggest Mr Duggan was not hit by a car as there were no signs of such an impact on him or the crashed vehicles.
"There are no traces of skin, hair, blood or clothing on either vehicle, nor is there any blood, tissue or clothing debris on the road," they said.
Their experts found that "defence wounds" to his hands and forearms with head wounds "excluded any possibility the injuries were caused when the body was hit, dragged or run over."
"Other indications suggest that Jerry was battered to death with a blunt instrument, possibly a fist or a boot," they said.
Their investigation also showed that Mr Duggan had swallowed a large quantity of blood.
The new evidence will be sent to the Attorney General this week in an attempt to secure a fresh inquest into Mr Duggan's death.
Mr Duggan's mother Erica said she hoped the new evidence would persuade British and German authorities to carry out a full inquiry.
"It is four years since my son was killed and it has been very hard that as a mother I should be left to investigate the death of my own son."
The original inquest was rejected by a British coroner who ruled Mr Duggan died in a "state of terror".