Define an accessory
Anyone who aids the perpetrator with advice or assistance before or at the time of the crime, or who acts in concert by watching whilst the crime is committed.
What is the title for the person who commits the crime or offence?
The principle
Define abettor
Any person who incites, instigates, encourages or counsels another to commit a crime.
When can a person be charged as being an accessory or abettor?
When they have guilty knowledge- they were aware of what was intended and what they were participating in.