1What does Article III, Section 2 of the 1987 Constitution protect?
The right of persons to be secure against unreasonable searches and seizures of their persons, houses, papers, and effects.
2What constitutional requirements govern issuance of a search warrant?
Probable cause personally determined by a judge after examination under oath or affirmation, with particular description of the place to be searched and things to be seized.
3What is the particularity requirement for a search warrant?
The warrant must sufficiently identify the place to be searched and the items to be seized to prevent an unrestricted exploratory search.
4What is a general warrant?
A warrant lacking the constitutionally required particularity and effectively authorizing a broad, discretionary search.
5Why are general warrants constitutionally prohibited?
They permit indiscriminate searches and undermine judicial control over government intrusions.
6What is the plain-view doctrine?
A recognized exception permitting seizure of evidence whose incriminating character is immediately apparent when officers are lawfully positioned to observe and access it.
7Does the plain-view doctrine authorize officers to enter private premises unlawfully?
No. Officers must have a lawful basis for their presence and access.
8What is a search incident to a lawful arrest?
A warrantless search permitted within legally recognized limits to protect officers and preserve evidence following a lawful arrest.
9Why must a search incident to arrest be connected to a lawful arrest?
The search exception depends on a valid arrest and cannot ordinarily be used to justify an otherwise unlawful arrest.
10What is a consented warrantless search?
A search conducted pursuant to valid, voluntary consent from a person legally capable of giving it.
11What factors affect whether consent to search is valid?
Voluntariness, surrounding circumstances, the person's authority, and whether consent was obtained through coercion or intimidation.
12Does silence automatically constitute valid consent to a search?
No. Voluntary consent must be established from the circumstances.
13What is the moving-vehicle exception to the warrant requirement?
An exception permitting certain warrantless vehicle searches when the legally required circumstances, including probable cause where applicable, are present.
14Does the mobility of a vehicle automatically justify every intrusive vehicle search?
No. The permissible scope depends on the facts and the applicable constitutional standard.
15What is a stop-and-frisk search?
A limited protective search for weapons based on specific, articulable circumstances creating reasonable suspicion that a person may be armed and dangerous.
16How does stop-and-frisk differ from a full evidentiary search?
Stop-and-frisk is narrowly directed toward officer safety rather than a general search for evidence.
17What is the exclusionary rule under Article III, Section 3(2)?
Evidence obtained in violation of the constitutional protections specified in Sections 2 or 3(1) is inadmissible for any purpose in any proceeding.
18What is the fruit-of-the-poisonous-tree doctrine?
A doctrine potentially excluding evidence derived from an unlawful search or seizure, subject to recognized limitations and exceptions.
19What is the independent-source doctrine?
A doctrine allowing evidence obtained through a genuinely independent lawful source despite a separate illegality.
20What is the significance of an intervening circumstance after unlawful police conduct?
It may affect whether subsequently obtained evidence is sufficiently connected to the original illegality to require exclusion.
21What does Article III, Section 12 protect during custodial investigation?
The rights to remain silent, to competent and independent counsel preferably of one's choice, and related safeguards against coercion.
22When do custodial investigation protections become particularly important?
When law enforcement questioning concerns a person under custodial investigation as a suspect in a criminal offense.
23Can police compel a suspect to sign a written confession without counsel?
No. The constitutional and statutory safeguards governing custodial confessions must be observed.
24What is the constitutional rule concerning an uncounseled custodial confession?
A confession obtained in violation of Article III, Section 12 is inadmissible under the Constitution.
25What is the purpose of Republic Act No. 7438?
To define and protect rights of persons arrested, detained, or under custodial investigation and prescribe duties and penalties relating to those rights.
26What is the significance of competent and independent counsel during custodial investigation?
Counsel helps ensure that the suspect understands and can effectively exercise constitutional rights.
27What is the constitutional prohibition against compelled self-incrimination?
No person shall be compelled to be a witness against himself or herself.
28Does the privilege against self-incrimination generally prevent collection of all physical evidence?
No. It principally protects against compelled testimonial self-incrimination, subject to applicable constitutional rules.
29What is the distinction between testimonial evidence and physical evidence for self-incrimination analysis?
Testimonial evidence communicates knowledge or assertions; physical evidence may consist of bodily characteristics or objects obtained under lawful procedures.
30What is the constitutional right to counsel in a criminal prosecution?
The accused's right to assistance of competent counsel in defending against a criminal charge.
31What is the Philippine Rule on DNA Evidence?
A.M. No. 06-11-5-SC, governing the use and evaluation of DNA evidence in covered proceedings.
32What is a DNA profile?
Genetic information derived from biological material and analyzed for identification or comparison under accepted methods.
33Why is contamination prevention important in DNA collection?
Contamination can introduce unrelated biological material and compromise interpretation of test results.
34What factors affect the probative value of DNA evidence?
Collection integrity, chain of custody, laboratory methods, quality controls, interpretation, and statistical significance.
35Does a DNA match automatically establish every element of a criminal offense?
No. It may support identification or contact, but the prosecution must still prove all required elements.
36What is postconviction DNA testing?
DNA examination sought after conviction under conditions recognized by the Rule on DNA Evidence.
37What is the purpose of habeas corpus in unlawful detention cases?
To require judicial examination of the legality of a person's restraint or detention.
38What is the Rule on Cybercrime Warrants?
A.M. No. 17-11-03-SC, establishing procedures for specified warrants involving computer data and cybercrime investigations.
39What is a warrant to disclose computer data?
A judicial authorization requiring disclosure of specified computer data under the conditions prescribed by the Rule on Cybercrime Warrants.
40What is a warrant to intercept computer data?
A judicial authorization permitting interception of specified computer data communications under the rule's requirements.
41What is a warrant to search, seize, and examine computer data?
A warrant authorizing specified search, seizure, and examination of computer data or systems under the applicable judicial procedures.
42What is a warrant to examine computer data?
Judicial authorization to examine computer data already lawfully obtained in circumstances covered by the Rule on Cybercrime Warrants.
43Why is judicial authorization important when examining seized digital devices?
A lawful seizure does not necessarily authorize unrestricted examination of all stored computer data.
44What is the purpose of limiting a cybercrime warrant's scope?
To protect privacy and ensure that investigative actions remain within the judicial authorization.
45What is the significance of forensic imaging of a digital storage device?
It creates a forensic copy for examination while helping preserve the original evidence.
46Why should investigators document the time and method of digital evidence acquisition?
To establish provenance, reproducibility, integrity, and a reliable investigative record.
47Scenario: Officers enter a home without a warrant, consent, or recognized exception and seize documents. What constitutional issue arises?
Unreasonable search and seizure, with possible exclusion of the documents.
48Scenario: A suspect makes an incriminating statement during custodial questioning without the required counsel. What rule applies?
The constitutional safeguards on custodial investigation and potential inadmissibility of the statement.
49Scenario: Investigators seize a laptop lawfully but want to inspect its stored files. What additional legal issue must be evaluated?
Whether examination of the computer data requires separate judicial authorization under applicable law and cybercrime warrant rules.
50Scenario: DNA from a crime scene matches a suspect, but the biological material could have been deposited earlier. What issue remains?
Whether the DNA evidence establishes involvement in the charged offense rather than merely earlier contact or presence.