Under the Fourth Amendment, warrants shall issue upon probable cause and must be supported by what?

Under the Fourth Amendment, warrants shall issue upon probable cause and must be supported by what?

• A. Oath or Affirmation
• B. Consent of the Subject
• C. A Formal Inquest
• D. Judge's Personal Belief

Answer: (A)

Warrants issued under the Fourth Amendment must be based on probable cause and backed by an oath or affirmation. That means someone provides a sworn, perjurable statement—an affidavit—outlining the facts that establish probable cause. The magistrate relies on that sworn information to determine whether a warrant should issue. The oath or affirmation serves as a check on truthfulness and accountability, linking the facts to a legitimate judicial determination. Consent of the subject would bypass the need for a warrant. A formal inquest isn’t part of modern warrant procedures, and a judge’s personal belief cannot substitute for the showing of probable cause supported by a sworn statement.

Warrants issued under the Fourth Amendment must be based on probable cause and backed by an oath or affirmation. That means someone provides a sworn, perjurable statement—an affidavit—outlining the facts that establish probable cause. The magistrate relies on that sworn information to determine whether a warrant should issue. The oath or affirmation serves as a check on truthfulness and accountability, linking the facts to a legitimate judicial determination.

Consent of the subject would bypass the need for a warrant. A formal inquest isn’t part of modern warrant procedures, and a judge’s personal belief cannot substitute for the showing of probable cause supported by a sworn statement.