Guo said he met officials from China's graft-busting Central Commission for Discipline Inspection and the Communist Party's Central Political and Legal Affairs Commission in London last year about Ma's case, adding that facts of the case differed from the allegations in the notice to Interpol.
He also rejected claims of corruption against him.
VOA, meanwhile, attributed the interview's abrupt end to miscommunication.
"We had multiple plans to conduct additional interviews with the subject for social media and late yesterday made the editorial decision to record this material, edit, and post it in the coming days, Bridget Serchak, Director of Public Relations VOA, said in an official statement.
"In a miscommunication, the stream was allowed to continue beyond the first hour. When this was noticed the feed was terminated. We will release content from these interviews and will continue to report on corruption issues."
- South China Morning Post