4th Amendment Flashcards
Are arrest warrant required to arrest someone in a public place?
No
When is a person “in custody”?
When in the presence of law enforcement, is not free to leave and is thus deprived of his freedom in a significant way.
What is required for a valid arrest?
Probable Cause based on police’s own observations or through information from 3rd parties
An informant’s tip may serve for probable cause if established by…
1- informants tip containing specific detail;and
2- the reliability of both the details and the informant being confirmed prior to the moment of arrest
What is required before police can arrest an individual in his own home?
- a valid arrest warrant WITH a knock & announce; OR
- exigent circumstances
- an arrest it thwarted because D retreats into the home
- imminent danger that D will escape or evidence will be destroyed
- hot pursuit supported by probable cause
Warrantless Arrests at Common Law
- Both police officers and citizens may make arrests for felonies committed in their presence and for misdemeanors that amount to a breach of the peace
- A warrant is required for a misdemeanor that the police officer didnt personally observe
What is Probable Cause?
Quantity of facts and circumstances within the police’s knowledge that would warrant a reasonable person to conclude that the individual in question has committed a crime (for arrest), or that specific items related to criminal activity can be found at a particular location (for a search)
What is reasonable suspicion?
- belief based on articulable info that is more than a mere hunch used by a reasonable person that the suspect has or is about to engage in illegal or criminal activity
***flight is not enough for probable cause but is enough for reasonable suspicison
What is the terry standard?
- In order to frisk a stopped individual, reasonable suspicion that the suspect is armed and dangerous is required
- anonymous tip alone is not enough for reasonable suspicion, BUT coupled with corroboration of some “predictive info” in the tip can justify an investigative stop.
What is the stop-and frisk rule?
If a police officer reasonably believed based on his own observations or those of an informant that criminal activity may be afoot, then the officer may stop and briefly question a suspect
***subjectivity doesn;t matter as long as the reasonable suspicion is supported by an objectively reasonable belief
When may a person have standing to assert his 4th amendment rights?
- When he has a legitimate expectation of privacy in the premises searched AND are not held out to the public
*** a car passenger doesn’t have standing to challenge the search of the vehicle but does have standing to challenge the police stop of the vehicle
A person has no REP in the following instances
1- handwriting exemplars 2- bank records 3- voice examplars 4- pen registers 5-private convos w/ eavesdropping
***open fields doctrine- curtilage around the home; naked-eye observations of property by air
Police Dogs
1- no foul when police dogs are used to sniff out contraband
2- police may NOT prolong traffic stops to wait for drug-sniffing dogs to inspect vehicles
What are the search and arrest warrant requirements?
1 - must be issued by a neutral and detached magistrate after an adequate showing of probable cause
2- must describe with particularity the identity of the suspect or the place to be searched
***Plain View doctrine applies for valid search warrants
2 Probable Cause Requirements for warrant
1- testimony or affidavit contains up to date and relevant facts or circumstances
2- a reasonable person would conclude it more probable than not that the named person or items will be found