Accomplice.
Or it could be an Abettor.
Arraign is when someone is called to court for a criminal charge. It can also mean that someone was found with fault.
a murderer?
It's called an accomplice, or a co-conspirator.
That person is an accessory or an accomplice.
a customer helper
Someone who sells houses is called a realtor.
breaking the law would constitute a criminal case.
Depending on the circumstances... either vandalism or criminal damage.
. . . is a criminal, or an offender, or an arrestee, or a defendant. or a misdemeanant, or a felon . . . . etc.
A proponent is someone who supports criminal justice or a criminal justice system.
Yes, it is a criminal offense to withhold someone's passport without their consent.
A criminal is someone that has been convicted of a crime. Once that has happened they are considered a criminal.