The case against Wikileaks founder Julian Assange may be on the brink of collapse following claims from the defence team that the central piece of evidence used in the case does not contain Assange's DNA.

According to details that have emerged in a 100-page police report submitted after witnesses were interviewed and forensic evidence had been examined, the condom submitted for evidence by one of the key alleged sexual assault victims does not contain Assange's DNA.

Assange's legal team have alleged that the lack of conclusive DNA evidence suggests that fake evidence may have been submitted and is calling the entire process into question. The Swedish prosecutor's office has yet to publicly comment on the report.

Assange currently remains in the Ecuadorian Embassy in London after being granted asylum as he fights against the claims and extradition to Sweden.