Illinois DUI HELP

Need help trying to find the Law or Statute that gives the defendant the right to view the evidence agaist him. I believe its called Discovery.

Discovery isn't a law, per se, it the pre-trial process by which each party ascertains evidence the other party will rely upon at trial.

Discovery
To begin preparing for trial, both sides engage in discovery. This is the formal process of exchanging information between the parties about the witnesses and evidence they’ll present at trial.

Discovery enables the parties to know before the trial begins what evidence may be presented. It’s designed to prevent "trial by ambush," where one side doesn’t learn of the other side’s evidence or witnesses until the trial, when there’s no time to obtain answering evidence.
One of the most common methods of discovery is to take depositions. A deposition is an out-of-court statement given under oath by any person involved in the case. It is to be used at trial or in preparation for trial. It may be in the form of a written transcript, a videotape, or both. In most states, either of the parties may take the deposition of the other party, or of any other witness. Both sides have the right to be present during oral depositions.

Depositions enable a party to know in advance what a witness will say at the trial. Depositions can also be taken to obtain the testimony of important witnesses who can’t appear during the trial. In that case, they’re read into evidence at the trial.

Often a witness's deposition will be taken by the opposing side and used to discredit the witness's testimony at trial if the trial testimony varies from the testimony taken during the deposition. (A lawyer might ask a witness at trial, “Are you lying now or were you lying then?”)
Usually depositions consist of an oral examination, followed by cross-examination by the opposing side. In addition to taking depositions, either party may submit written questions, called interrogatories, to the other party and require that they be answered in writing under oath. If one party chooses to use an interrogatory, written questions are sent to the lawyer representing the other side, and that party has a period of time in which to answer.


Other methods of discovery include

• subpoenaing or requiring the other side to produce books, records or other documents for inspection (a subpoena is a written order issued by a court compelling a person to testify or produce certain physical evidence such as records);
• having the other side submit to a physical examination; or
• asking that a document be submitted for examination to determine if it is genuine.

For more information, see the links at the bottom of this page: Steps in a Trial: Discovery (Resources, ABA Division for Public Education)