The Hong Kong police investigation into the murders is affected by suggestions Jutting has been receiving treatment for a mental illness since his early 20s. Investigators are working on the assumption that he had been being treated for schizophrenia, and may have stopped taking medication in recent months. He is being remanded for two weeks and the trial is suspended while psychiatric tests are done.
The Daily Mail reports that Jutting was a member of the Cambridge rowing club and was a cross-country runner at Winchester College, but began heavy drug and alcohol use after a relationship breakup with a fellow City trader, Sarah Butt, who he met in 2010. She is reported to have moved to New York to work for Goldman Sachs, and kissed another man, which Jutting considered to be an affair. It publishes photos from his Cambridge days showing a slim, tanned Jutting, and cites sources as saying that substance use left him overweight, aggressive, and behaving ‘like a zombie’.