Yes, there are many ways of defending criminal offences under the Crimes Act 1900.
The first thing to be aware of is that the prosecution must prove every one of the elements (or ingredients) of any offence under the Crimes Act 1900 beyond a reasonable doubt in order for a person to be found guilty.
Many of the offences under the Crimes Act 1900 require the prosecution to prove several elements.
If the prosecution is unable to prove any one of those elements beyond a reasonable doubt, you cannot be found guilty of the offence.
In addition to this, there are several legal defences to charges under the Crimes Act 1900, including self-defence, duress, necessity, automatism and mental illness defences.
If you can raise evidence of any of these defences, the prosecution must then prove beyond a reasonable doubt that the defence does not apply in your case.
If the prosecution is unable to do so, you are entitled to an acquittal – in other words, a finding of not guilty.