MidTerm Deck Flashcards
Probable Cause Definition
Viewed in a totality of circumstances, there is a substantial basis for knowledge or belief.
What does Probable Cause Do?
P.C. makes a search or seizure reasonable.
Why is Probable Cause imprecise?
Probable Cause is necessarily imprecise because it must be particularized to the person who is to be searched or seized. A reasonable ground of guilt must be particularized, it deals with probabilities and depends on a totality of circumstances. (MD v. Pringle)
MD v. Pringle
Definition of PC has evolved through Supreme Court decisions. The substance of probable cause is a reasonable ground for belief of guilt and the belief or guilt must be particularized with respect to the person being arrested.
Knock and Announce Rule
(Hudson v. Michigan). Officers must wait a reasonable time after knocking and announcing before entering. If officers violate this rule, it does not necesarrily trigger the exclusionary rule (by itself).
IL v. Gates
(Substantial basis for belief.) The task of the magistrate is to make a practical, common sense decision whether given all the circumstances set forth in the affidavit before him, including the “veracity” and “basis of knowledge” of persons supplying hearsay information, there is a fair probability that contraband or evidence of a crime will be found in a particular place.
Spinelli
Two prong test: 1) Veracity, and 2) Basis of Knowledge.
Notes about Probability
0% – very uncertain
Probable Cause– sufficient to issue a warrant
50% – about half certain
Preponderance of Evid. – Civil trial wins here
Beyond Reasonable Doubt – Criminal trial wins here
100% – Completely sure: not likely to happen
Magistrate
Must be neutral and detached (Gates AND Coolidge)
Executive Branch
Can’t issue warrants. Cops and Prosecutors aren’t neutral or detached.
Shadwick v. City of Tampa
Magistrates must be:
1) Neutral and detached.
2) Capable of determining whether PC exists.
Ybarra v. IL
A search must be particularized to the person being seized. (you can’t arrest someone simply because they are ‘near’ or proximate to a person for whom you have a warrant).
Horton v. CA
(Plain view Doctrine) Plain view seizures are not necessarily required to also be inadvertent.
At common law, a person may be arrested when:
Misdemeanor or felony witnessed by officer OR Probable cause that a felony has occurred, or is about to be committed.
US v. Watson
A government official (postal inspector) may arrest someone without a warrant upon probable cause if they believe the person has committed a felony. Supreme Court allows for warrantless arrest when exigent circumstances, because “we’ve always done it that way.”
Atwater v. City of Lato Vista
Illustration of Common Law Arrest. The officer witnessed the driver and her kids driving without seat belts.
Gerstein v. Pugh
If arrested as a result of an officers’ on-scene determination of P.C., a timely determination of P.C. is a prerequisite for detention.
The County of Riverside v. McLaughlin
Timely determination of P.C. for detention is defined as 48 hours (but this is not a brightline).
U.S. v. Robinson
Search incident to arrest (SITA). A full search of the person in custody is allowed for 1) officer safety and 2) preservation of evidence.