‘We established that he’d not only purchased acid on that day, but a number of days, and he’d purchased a total of 60 litres of acid – which is an enormous amount of acid to buy.’
Sgt McLeish told A Current Affair he initially thought Andres had used the acid to clean up a crime scene at his Cairns home, but a search of the property unveiled a gruesome discovery.
‘Forensic officers examined the stormwater drain out the front of his house. There was a large stormwater drain directly out the front of his house and we discovered porcelain false teeth in the drain,’ Sergeant McLeish said.
‘That, for us, cemented the fact that he had committed this despicable crime against his wife.’
Detectives ruled that Andres had used the 60 litres of acid to dissolve Ms Cao’s body in a bin over several days.
An extramarital affair and money appear to be the main motivators, Sgt McLeish said.
Andres was found to be having a relationship with another Thai woman and had forged his wife’s signature so he could collect her Centrelink payments.
‘I don’t like to use the word psychopath, but that’s his personality,’ Sgt McLeish said.
‘He’s just an evil, greedy, arrogant little man.’
Andres was found guilty of killing Ms Cao and was sentenced to life in prison by a Cairns jury in 2013.
His appeal to the High Court of Australia in 2016 was denied.
Originally published as
'Psychopathic' husband murdered his wife then burned her body in acid - but was brought undone when police found her porcelain false teeth in a drain
- Detective tells of grim evidence that led to ¿psychopath¿ killer who dissolved wife¿s body in acid – 9news.com.au