Interrogatories are written questions that typically happen in civil cases. Attorneys do not see written interrogatories in DUI cases. A subpoena is using the power of the court to require either a person or a person with documents to show up at a certain time. If an attorney wants to subpoena, for example, a witness, that means they do not have any choice in the matter. If someone is served a subpoena, they are required by law to show up at the court at a certain date and time. Subopoenad witnesses are a common occurence that may follow after the discovery process in a Midland DUI case.
Subpoenas are usually used to get witnesses to testify in court. A subpoena may also be issued for documents. Many times, an attorney may choose to subpoena a police officer to bring their manuals or anything they may testify about in relation to a certain type of study or subject matter. There have been other instances in which an attorney has used a subpoena to get the police department to make a specific officer to testify due to some sort of unique information they possess or some if their file relates to the case.