a witness
an accessory after the fact may be what you are looking for
If they were not in a competition, they should call the police. They have committed the crime of battery, which is illegal.
Dora or Jane or whatever you want to call her she is the person who stands by the door and is Emily's guardian.
There is no specific word for this.
A person who commits a crime is known as a criminal.
a witness
They are called the Coroner.
Criminal sociopath.
say kaleb is cool
Such a person would be an accomplice or a partner in crime.
They call it deadly force, but if you resist with a deadly weapon and you have committed a serious crime and they find you, they can.
greedy, unethical, with out shame or morals