The pharmacology professor could face up to 10 years if convicted.
The court heard earlier in the trial that Khaw had told colleagues he planned to use the gas on rabbits. He later told police he had taken it to get rid of rats at home.
The Swiss citizen, whose grandfather founded Egypt's Muslim Brotherhood, was charged in France in February with raping two women in hotels in 2009 and 2012.
Khaw Kim Sun, 53, of the Chinese University of Hong Kong's anaesthesia and intensive care department, has pleaded not guilty to accusations of murdering his wife and daughter in 2015.
The associate professor from the Department of Mechanical Engineering had reported his wife missing, saying she had not returned home after an argument.
Police said they became suspicious of Cheung after CCTV footage failed to show his wife leaving their home, while Cheung was also seen moving a large wooden box out of the premises.
Muslim doctors who follow Quranic principles in handling the LGBT community are often seen as bigots or as spreading hatred even if this is done with the intention of giving advice to the public.
Dr Adeeba Kamarulzaman of the Malaysian AIDS Foundation ticks off a medical doctor for her comments against the LGBT community.
The education ministry should take another look at the Islamic education syllabus with a view of the bigger picture of nation-building.
Experts in comparative religion usually do not belong to any faith because if they do, they will be charged with academic bias.
The Penang Transport Master Plan, costing RM46 billion, is the largest project the state plans to undertake, and must be closely scrutinised.
Rezaul Karim Siddique of Rajshahi University had been murdered by two Islamic extremists in 2016.
Language professor Shen Yang has been accused of committing an act of sexual assault that led to the victim's suicide in 1998.
Professor Matt Gibbs worked with Barn Hammer Brewing Company to recreate a fourth-century beer from ancient Egypt.
Sulston won the Nobel prize for medicine in 2002 for his work on genome sequencing.
Michelle Simmons won the award for creating the world's first transistor made from a single atom.
He says people cannot remain silent on rampant plagiarism, sexual harassment and lecturers being absent for work for months.
It advises public to get authentic information from its website instead of believing viral messages spread over WhatsApp.
Robert dilihat tenang dengan meminta maaf beberapa kali sebelum kedua-dua anaknya digarab dan dibawa keluar oleh ibu mereka.
Pakatan Harapan negotiating with PAS to ensure a straight fight with BN for the by-election on June 18.