What is the test for calling an expert witness to validate the existence of radar technology?
California, United States of America
The following excerpt is from People v. King, 266 Cal.App.2d 437, 72 Cal.Rptr. 478 (Cal. App. 1968):
2 Of course, the use, validity and accuracy of certain scientific devices may be of such common and universal knowledge that the court may take judicial notice of this fact and it is not necessary to call an expert witness to validate this fact (Radar). (People v. MacLaird, 264 A.C.A. 1110, 71 Cal.Rptr. 191.)
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