Kim Dotcom offers to travel to United States

Kim Dotcom offers to return to United States
He says he has evidence of interference in the US election (Getty)

Alleged criminal Kim Dotcom has offered to travel to the United States - if his conditions are met.

His solicitors in New Zealand have sent a letter to Robert Mueller - the Special Counsel appointed to investigate interference with the 2016 United States presidential election - offering Dotcom's aid in the investigation.

However, as the US is seeking Dotcom's extradition to face trial, they want to make sure he is allowed to return.

"Mr Dotcom has evidence that he considers relevant to the Investigation," the letter reads.

"He is concerned that, should he travel to the United States voluntarily, he would be arrested and detained in custody on the current counts on which he has been indicted."

His solicitors offer the following deal to Mr Mueller:

"Accordingly, for Mr Dotcom to attend in person in the United States to make a statement, and/or give oral evidence at any subsequent hearing, special arrangements would need to be discussed and agreed between all relevant parties," the letter reads.

"Such arrangements would need to include arrangements for his safe passage from New Zealand and return."

The US claims that Dotcom and others were members of a worldwide criminal organisation that engaged in criminal copyright infringement and money laundering on a massive scale with estimated loss to copyright holders well in excess of USD$500 million, which they term the "Mega Conspiracy".