reasonable expectation of privacy

They cant check your diary, your safe, or check your medical records

government officals examinaionof and hunt for evidence on a person or in a place in the manner that intrudes on reasonable expectations of privacy ( search dor evidence)

officers may examine, and use as evidence without a warrent, contraband, or evidence, that is open to view at location where they are legally permitted to be.( No searching)

arresed , property, evidence, situations, in which police officers use people of their authority to deprive people of their liberty, or property and which must not be" unreasonable" according to the 4th amendment

a police officer given beliefs based on  articulable facts ( you think you have to have a reason)