please explain the meaning and significance of the following terms

Please explain the meaning and significance of the following terms:

a) Reasonable Suspicion

b) Probable Cause

c) Reasonable Expectation of Privacy

1. How do these concepts relate to criminal investigations?

2. If an investigator suspects that domestic violence has occurred, what investigative

techniques might he or she use to prove it? What if there are no obvious physical signs?

3. Describe the value of profiling in rape investigations.

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