I have a civil case where there were several witness but I do not know if all of them will remember the events that transpired. Other than a deposition is there a way to see what they remember and have the answer question (i.e. "interrogatories to a non-party")?

Have you browsed through the information in LawInfo's Free Legal Resource Center to learn more about your issue yet? See: http://www.lawinfo.com/consumer.html and http://resources.lawinfo.com/en/index.html. You can certainly try to speak to a lawyer to determine what legal options may be available. In the meantime, you may be able to learn more on your own. Search the "Free Legal Resources" tab, or browse the Consumer Resources. Good luck.