California, United States of America
The following excerpt is from People v. Henze, 253 Cal.App.2d 986, 61 Cal.Rptr. 545 (Cal. App. 1967):
Realistic credit should be given to the experience and expertise of police officers in detecting and evaluating suspicious behavior. As we stated in People v. Cowman, supra, 223 Cal.App.2d 109, 117, 35 Cal.Rptr. 528, 534 (hearing denied), the ability of experienced police officers who have learned to perceive the suspicious nature of unusual conduct is an acquired ability which serves the safety and security of the law-abiding citizens of the community, the benefits of which 'should not be lost because the cold record before a reviewing court does not contain all the particularized perceptions which may have been so meaningful at the scene.'
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