forensics

• 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.