Evidence subjected to preliminary or field testing

  Identify what types of evidence might be subjected to preliminary or field testing. Describe at least two types of testing that might be done on scene. Differentiate between why some evidence can and should be subjected to preliminary testing on scene, while other types should not. Explain how the on-scene test compares to laboratory testing. Compare and contrast the results yielded by preliminary field versus laboratory testing. Compare and contrast the admissibility of on-scene versus laboratory testing at trial.