China scientist claims Neil Heywood was murdered over 'unspeakable' secret Speaking to The Daily Telegraph, Ms Wang - who also is the vice-chairman of the Chinese Forensic Medicine Association - claimed it "was not possible that Gu did it just because someone had threatened her son." She also discarded the idea that a rumoured romance between Ms Gu and Mr Heywood had triggered the murder. "I believe it was [a] killing to stop someone from disclosing a secret and that secret is not a sexual relationship, but bigger and more complicated, unspeakable," she said. Ms Wang said she believed the true reasons behind Mr Heywood's murder would be traced back to the city of Dalian, where Bo Xilai was mayor between 1993 and 2000 and where Mr Heywood lived for a period in the 1990s, apparently working initially as an English teacher. "The root is in northeast China," she said, where "they met and became good friends." Ms Wang, who first questioned evidence in the case on her blog in September, admitted she had not had access to new or hidden evidence but said she had analysed and compared public documents relating to Ms Gu's trial and that of Chongqing's former police chief, Wang Lijun, who in September was convicted of attempting to cover up Mr Heywood's murder. Analysts now expect Mr Bo to be put on trial after the 18th Party Congress, which should start on November 8 and will see China's new leadership unveiled.