When detaining suspected shoplifter as long as the merchant detains the suspect with probable cause, in a reasonable manner, and for not more than a reasonable time.
Most of the states provide an affirmative defense to merchants accused of false imprisonment. False imprisonment occurs when a person, who doesn't have legal authority or justification intentionally restrains another person's ability to move freely.
The general rule in detention of someone suspected of shoplifting is that the situation can evolve into an arrest if he or she is taken into custody for the crime.
Hence, the shop owner or manager can detain the person when there are reasonable belief and proof that the suspect did engage in shoplifting.
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