The Crown questioned him about that, asking if he defecated outside Ms Billingsley's house because he was trying to cast a love spell on her.
Rizalman maintains he suffered from diarrhoea and entered Ms Billingsley's house to clean himself up, but the Crown says the motive was sexual and he had tried to make moves on other women in the days before too.
Rizalman did not admit smoking the legal highs he bought and said at the time of his offending he was suffering from stress because of pressures at work.
University of Auckland professor of psychiatry Graham Mellsop interviewed Rizalman last month and his report was submitted to the High Court at Wellington.
During the interview Rizalman said a 2014 report by a Malaysian Army medical team "contained those negative things about him because it was the Malaysian way to always blame their underlings".
That report found:
• In the days leading up to the offending, Rizalman was alternatively sleepy or operating at "reasonable performance" levels. Positive drugs tests suggest this varied according to his drug use.
• His accounts of taking substances appeared to contain untruths. Examples of this included claiming not to have used cannabis and alcohol, when urine tests suggested otherwise, and claiming to smoke seven cigarettes a day, when he probably puffed 20.
• Some opinions from his work claimed Rizalman was a "regular cheat" and "manipulative person".
• A Wellington medical assessment in May 2014 diagnosed "mixed depression and anxiety".
• That Rizalman was not suffering from a mental illness.
Rizalman was appointed to his Wellington posting in September 2013. He was an assistant to the defence attache and found the position stressful.
"His major concern was that there was an element if corruption by his superiors with which he, as an underling, had to comply," Professor Mellsop's report said.
"It was, he said, immoral. So he had not wanted to comply, but felt that he had to obey the orders of superiors.
"He became 'stressed', developed headaches, the excessive sleepiness and the forgetfulness described in his statement."
Rizalman said he did not try to alter his feeling by resorting to alcohol or drugs, which under his Islamic religion, would have been wrong or immoral.
Professor Mellsop said it was difficult to form a conclusive opinion of Rizalman's mental state at May 2014, because not "appropriately skilled psychiatric assessment" was undertaken.
But the professor's expert opinion, "on the balance of probabilities", was that Rizalman suffered from symptoms consistent with "a combination of anxiety and ingestion of cannabis or cannabinoid substances".
"My opinion is therefore that not only was he not suffering from a disease of the mind, but that he did know both nature and quality of his actions and that he was capable of considering their moral wrongfulness or rightfulness according to commonly accepted standards."
In court on Friday, Rizalman's lawyer Donald Stevens, QC, questioned the robustness of the Malaysian report and noted how concerned Rizalman's wife had been about his behaviour.
In mid-April 2014, Rizalman's wife took him to another doctor at a medical centre in Johnsonville.
The doctor was told Rizalman was stressed at work and was no longer playing football.
He was sleeping excessively and well, but was still tired, Dr Stevens said.
He said Rizalman had said he was stressed because in New Zealand he didn't have other officers to help him at work, as he did back home.
Professor Mellsop said: "His account of his difficulties differs according to whom he is talking, and at different times."
