What is a “Custodial Interrogation” that invokes a Miranda warning?

As almost everyone undoubtedly knows from school/tv/movies/books, in talking to law enforcement, you have the right to remain silent.  The United States Constitution’s Fifth Amendment protects against compulsory self-incrimination from the federal government. (“No person shall…be compelled in any criminal case to be a witness against himself…”).[1]

For this reason, the Supreme Court, in Miranda v. Arizona,[2] 384 U.S. 436 (1966), held that statements a defendant makes during a custodial interrogation are only admissible as evidence in a criminal trial if the defendant was told of his or her right to remain silent, and the right to speak with an attorney, and the waiver of such rights was knowing and voluntary.

An important limitation in Miranda, is that the interrogation must be a “custodial” interrogation.[3]  If it is not a “custodial” interrogation, then any self-incriminating statements made to law enforcement can (and will be) used against the declarant with no Miranda warnings.[4]  Thus, whether or not the interrogation is “custodial” can have significant implications.

Custodial? Or Non-custodial?

So, when is an interrogation “custodial”?  Unfortunately, the answer is: it depends.

Certainly, being placed under formal arrest places one “in custody.”  This is why the most frequent time you will hear a Miranda warning is when an individual is formally placed under arrest by law enforcement officers.

However, you can also be “in custody” for purposes of Miranda when “a reasonable person in the suspect’s position would have understood the situation to constitute a restraint on freedom of movement of the degree which the law associates with formal arrest.” United States v. Palmer, 111 F.4^th 588, 594 (5^th Cir. 2024); Howes v. Fields, 565 U.S. 499 (2012).  This “freedom of movement” test is an objective inquiry, and depends on the totality of the circumstances.  Id.  Courts list factors to consider in the interrogation, such as the length of the interrogation, its location, the accusatory/non-accusatory nature of the questioning, the restraint on the individual’s physical movement, and statements made by the officer regarding the individual’s freedom to move or leave.  See Palmer, 111 F.4^th at 594; Howes, 565 U.S. at 509.  Simply asking “Am I free to leave?” can definitely shed light on whether or not you’re in “custody” for purposes of Miranda.  However, not being “free to leave” is a necessary, but not sufficient, condition necessary to find “custody.”  Id.  Thus, being temporarily detained for an ordinary traffic stop is generally not considered “in custody” for purposes of Miranda.  Berkemer v. McCarty, 468 U.S. 420, 440 (1984).

So, if you confess to illegally owning a firearm within five minutes during a routine traffic stop, it probably was not a custodial interrogation (and no Miranda warning was required).  See Palmer, 111 F.4^th at 594-595.  If you are awakened by a dozen law enforcement officers, handcuffed, and questioned for over an hour in your home (while being told you’re only allowed to take a break to use the bathroom or get a snack), you probably were “in custody.”  United States v. Cavazos, 668 F.3d 190, 194 (5^th Cir. 2012).

Why do Miranda warnings matter?

First, if a Miranda warning is required but is not given by a law enforcement officer, any self-incriminating statements will not be able to be used by the government in its case-in-chief to prove the alleged guilt of the suspect.  See e.g., Missouri v. Seibert, 542 U.S. 600, 608 (2004).[5]  The “confession” gets thrown out.

Second, a Miranda warning has been described by the Supreme Court as “prophylactic,”[6] in that it is meant to protect against a violation of the 5th Amendment right against self-incrimination.  If a Miranda warning is given by a law enforcement officer, it can serve as a valuable reminder to the individual (in addition to the protections actually referenced in a Miranda warning) that:

this is a serious situation and the individual being questioned is a suspect (i.e. the law enforcement officer is not just “chatting” or seeking helpful information);

the law enforcement officer is not on the individual’s “side”;

the individual has the right to seek assistance before answering questions.

In practice, if you receive Miranda warnings, it is best to say nothing until your attorney is present.  Indeed, depending on the specific facts of a case, it may be advisable to say nothing to law enforcement even before Miranda warnings are required. Under 18 USC § 1001, it is a federal crime to make a false statement to a federal law enforcement officer.  Even denying a crime (an “exculpatory no”) can form the basis of a section 1001 charge.[7]

Simply put, the government’s interrogative powers have serious consequences for a suspect, so it can real benefit for a suspect to be reminded of their rights (via a Miranda warning) in a high-adrenaline and confusing situation.

[1] The Fourteenth Amendment extends this right to protect against compulsory self-incrimination from state officials as well.  Malloy v. Hogan, 378 U.S. 1 (1964).

[2] A typical Miranda warning notifies an individuals (1) they have the right to remain silent; (2) statements made by them will be used against them; (3) they have the right to an attorney; and if they cannot afford an attorney, one will be appointed for them.

[3] United States v. Wright, 777 F.3d 769, 774 (5th Cir. 2015) (quoting McNeil v. Wisconsin, 501 U.S. 171, 178, 111 S.Ct. 2204, 115 L.Ed.2d 158 (1991)).

[4] United States v. Harrell, 894 F.2d 120, 123 (5th Cir. 1990).

[5] Suppressed or excluded admissions can generally be used for other purposes, however, such as to impeach a testifying witness.  See Harris v. New York, 401 U.S. 222 (1971).

[6] See e.g. Doyle v. Ohio, 426 U.S. 610 (1976), Howes v. Fields, 565 U.S. 499, 507 (2012); J.D.B. v. North Carolina, 564 U.S. 261, 269 (2011); see also Vega v. Tekoh, 597 U.S. 134 (2022) (analyzing whether the fact that a Miranda warning is “prophylactic” means noncompliance therewith is not an ipso facto violation of the 5^th Amendment).

[7] Uncomfortable with the application of section 1001 to mere denials of wrongdoing to federal agents, several courts created a judicial exception (known as an “exculpatory no”).  See e.g., Moser v. United States, 18 F.3d 469 (7^th Cir. 1994); United States v. Taylor, 907 F.2d 801 (8^th Cir. 1990).  The “exculpatory no” doctrine was eventually rejected by the Supreme Court in Brogan v. United States, 522 U.S. 398 (1998).  See also https://freemanlaw.com/section-1001-false-statements/.