A licensed trial lawyer, hired or appointed to conduct the legal defense of a person accused of a crime and to represent him or her before a court of law. 

An attorney whose official duty is to conduct criminal proceedings on behalf of the state or the people against those accused of having committed criminal offenses: also called a district Attorney or State's Attorney

A person who has either suffered death or serious physical or mental suffering, or the loss of property resulting from actual or attempted criminal actions committed by others.

A person who has special knowledge and skills recognized by the court relevant to the determination of guilt or innocence unlike lay witnesses expert witnesses may express opinions or draw conclusions with their testimony 

An eyewitnesses character witnesses or other person called on to testify who is not considered an expert lay witnesses must testify to facts only 

a person who has special knowledge and skills recognized by the court relevant to the determination of guilt or innocence unlike lay witnesses expert witnesses may express opinions or draw conclusions with their testimony 

The court officer whose duties are to keep order in the courtroom, secure witnesses, maintain physical custody of the jury, and announce the entry of the judge       

A government employee who works directly with the trial judge and is responsible for court paperwork and records before and during the trial

A ___________ does not have to have any special training to testify, they testify about what they have seen or witnessed