Defendant-Appellant Jose A. Rodriguez appeals from the district court’s denial of his motion to suppress incriminating statements that he claims National Park Rangers obtained in violation of his
Miranda
rights. The district court held that, under
Davis v. United States,
I. FACTUAL BACKGROUND
On October 8, 2005, National Park Service Ranger Dustin Gunderson observed Appellant-Defendant Jose Rodriguez driving his pick-up truck erratically through Lake Mead National Recreation Area, west of Las Vegas. Gunderson suspected that the truck’s driver was intoxicated, so he stopped the truck. After running Rodriguez’s driver’s licence and learning from his radio dispatcher that Rodriguez was a registered felon, Gunderson asked Rodriguez to step out of the truck so Gunderson could perform a field sobriety test. As Gunderson stepped back to administer the test, he noticed the handle of a pistol protruding from an open orange bag in the bed of Rodriguez’s truck. This pistol, identified as a Ruger .22 caliber pistol, had a device, later determined to be a homemade silencer, attached to it. After securing the firearm, Gunderson asked Rodriguez if there were any other weapons in the vehicle. Rodriguez admitted that there was another firearm under the driver’s seat. This was later identified as a Para-Ordnance .40 caliber pistol. Ranger Gunderson called for backup, then placed Rodriguez under arrest and detained the two passengers in Rodriguez’s truck.
*1075 After he and his backup, Ranger Bill Reynolds, secured the scene, Gunderson read Rodriguez his Miranda rights. Gun-derson then asked Rodriguez if Rodriguez wished to speak to him. Rodriguez responded, “I’m good for tonight.” Gunder-son later testified that he understood this to mean that Rodriguez was willing to talk, but he did not immediately begin interrogation. Rather, a “short time later,” Reynolds began questioning Rodriguez while Gunderson contacted his supervisor. In response to Reynolds’s questions, Rodriguez admitted that the bag, and the gun and silencer it contained, belonged to him.
Rodriguez was ultimately charged with two counts of being a felon in possession of a firearm, 18 U.S.C. § 922(g)(1) — count I for the Para-Ordnance .40 caliber, count II for the Ruger .22 caliber 1 — and one count of possession of an unlicenced silencer, 26 U.S.C. § 5861(d). Rodriguez filed a pretrial motion seeking to suppress both the physical evidence and the statements he made to the Rangers. He claimed several Fourth Amendment violations concerning the scope of the traffic stop. 2 He also alleged that the Rangers obtained his statements in violation of Miranda because he had invoked his right to silence. The district court ordered an evidentiary hearing before a magistrate judge, who conducted a hearing exploring the circumstances of the seizure and the statement. Only Gunderson testified as to the circumstances of the Miranda warning.
The magistrate judge denied the motion to suppress. The court held that Gunder-son “reasonably construed the response ‘I’m good for tonight’ as a waiver of his Miranda rights based on his observation of Rodriguez’s demeanor and gestures and the context in which the response was made.” The magistrate further noted:
Additionally, because this statement is susceptible of different meanings, it is, definitionally, ambiguous. The statement “I’m good for tonight” could reasonably mean “I’m willing to talk tonight” or “I don’t want to talk tonight.” Thus, even if another law enforcement officer in Gunderson’s position would not have reasonably construed the phrase as a waiver, the court joins those courts which have decided that officers are not required to cease questioning altogether, or to limit questions to clarify whether a suspect intends to invoke the right to remain silent unless the suspect clearly expresses his wish to remain silent.
The magistrate judge stated that, in
Davis v. United States,
The district court adopted the magistrate judge’s report in full. Rodriguez entered a conditional guilty plea to all counts. The district court accepted the guilty plea, and sentenced Rodriguez to 46 months as to each count, to be served concurrently. Rodriguez appealed.
*1076 II. JURISDICTION AND STANDARD OF REVIEW
We have jurisdiction to hear this case under 28 U.S.C. § 1291.
Before a defendant’s self-incriminating statements may be admitted into evidence, “a heavy burden rests on the government to demonstrate that the defendant knowingly and intelligently waived his privilege against self-incrimination and his right to retained or appointed counsel.”
Miranda v. Arizona,
This court reviews a trial court’s legal conclusions on
Miranda
waivers de novo, and findings of fact underlying those conclusions for clear error.
United States v. Narvaez-Gomez,
III. DISCUSSION
Rodriguez argues first that his statement to Gunderson, “I’m good for tonight,” was an unambiguous invocation of his right to silence. He next argues that, to the extent his statement was ambiguous, Gun-derson was under a duty to further clarify its meaning before he or any other Ranger proceeded with interrogation. We address each argument in turn.
A.
At the suppression hearing, Gun-derson offered the following uncontrovert-ed testimony concerning the Miranda warning he gave Rodriguez:
Q. Now, when you were reading Mr. Rodriguez his Miranda rights you of course told him that he had the right to remain silent?
A. Correct.
Q. You told him that anything that he said could and would be used against him in a court of law?
A. Correct.
Q. You told him that if he could not afford to hire an attorney one would be appointed to represent him before any questioning, if he wished one?
A. Correct.
Q. You also told him that if he decided to answer any questions now, without having counsel present, he could also choose to stop answering at any time?
A. Correct.
Q. And you told him that he could request counsel at any time during questioning?
A. Correct.
Q. And after saying that you asked him whether understanding those rights, if he wished to speak to you?
A. Correct.
Q. And his answer to that was “I’m good for tonight?”
A. Correct.
The magistrate judge stated that this response was “definitionally ambiguous,” as it could have indicated either that Rodriguez was willing to talk, or that he was invoking his right to silence. Rodriguez disagrees, and contends that his statement “was neither ambiguous nor equivocal” because he “did not use words of an equivocal nature, such as ‘maybe’ or ‘might.’ ” It is true that his statement was certainly not “equivocal” in the sense of evincing indecision or uncertainty.
Compare Davis,
512
*1077
U.S. at 459,
We disagree. The phrase “I’m good,” in the context of a Miranda waiver, admits of different interpretations. From Gunder-son’s testimony, it appears that the phrase “I’m good for tonight” was in direct response to an inquiry concerning whether Rodriguez wanted to talk to Gunderson. The phrase might have meant, “I’m good [to talk] for tonight.” Alternatively, the phrase “I’m good” can indicate, more idiomatically, that the speaker is declining or refusing an offer — roughly equivalent to the phrase “no thanks.” In this case, the phrase could be interpreted as declining Gunderson’s offer to talk with him. Conversely, the phrase, given at the end of a Miranda warning which acts, in effect, as an offer of the rights to counsel and silence, could indicate that Rodriguez was declining that offer and waiving those rights. We therefore hold the statement to be, at best, an ambiguous invocation of the right to silence. 4
B.
Having determined that the statement was not an unambiguous invocation of the right to silence, we must next determine what Gunderson ought to have done in response. Prior to 1994, this circuit, along with a number of other jurisdictions, adopted a broad “clarification” rule: in the face of an ambiguous or equivocal assertion of
Miranda
rights, made at any time during interrogation, interrogating officers were required to clarify the statement before continuing with interrogation.
See Nelson v. McCarthy,
In
Davis,
the defendant, whom the Naval Investigative Service suspected of murder, was issued his
Miranda
warning and expressly “waived his rights to remain silent and to counsel, both orally and in writing” upon being taken into interrogation.
The holding of
Davis,
however, addressed itself narrowly to the facts of the case: “We therefore hold that,
after a knowing and voluntary waiver of the
Miranda
rights,
law enforcement officers may
continue
questioning until and unless the suspect clearly requests an attorney.”
Id.
at 461,
[T]he primary protection afforded suspects subject to custodial interrogation is the Miranda warnings themselves. “[FJull comprehension of the rights to remain silent and request an attorney [is] sufficient to dispel whatever coercion is inherent in the interrogation process.” A suspect who knowingly and voluntarily waives Ms right to counsel after having that right explained to him has indicated his willingness to deal with the police unassisted. Although Edwards provides an additional protection — if a suspect subsequently requests an attorney, questioning must cease — it is one that must be affirmatively invoked by the suspect.
Id.
at 460-61,
In other words, the “clear statement” rule of
Davis
addresses only the
*1079
scope of invocations of
Miranda
rights in a
post-waiver
context. It is well settled that “[ijnvocation and waiver [of
Miranda
rights] are entirely distinct inquiries, and the two must not be blurred by merging them together.”
Smith v. Illinois,
The existence of a prior waiver explains how
Davis
can be reconciled with the Supreme Court’s historic presumption against finding waiver of constitutional rights.
Miranda
itself, in describing the government’s burden to prove waiver as “heavy,” stated that “[t]his Court has always set high standards of proof for the waiver of constitutional rights, and we reassert these standards as applied to in custody interrogation.”
*1080
Davis,
therefore, abrogated our clarification rule only to the extent that our rule required clarification of invocations made
post-waiver. Nelson v. McCarthy,
however, expressly contemplated both pre- and post-waiver assertions of
Miranda
rights.
We do not hold that all waivers of
Miranda
rights must be
express:
“a suspect may impliedly waive the rights by answering an officer’s questions after receiving
Miranda
warnings.”
United States v. Rodriguez-Preciado,
waiver. Rodriguez’s statement, “I’m good for tonight,” however ambiguous, was unquestionably a response to Gunderson’s
Miranda
warning and offer to begin interrogation. Whatever it means, his “statement either is such an assertion [of
Miranda
rights] or it is not.”
Smith v. Illinois,
IV. CONCLUSION
We hold that the clarification rule of Nelson v. McCarthy survives Davis v. United States, except in situations where
*1081 the suspect under interrogation has already given an unequivocal and unambiguous waiver of his Miranda rights. Because Rodriguez’s statement in response to the Miranda warning was ambiguous, and because his interrogator failed to clarify Rodriguez’s wishes with respect to his Miranda warnings, the district court erred in admitting his subsequent incriminating statements into evidence.
The decision of the district court is REVERSED, and the case is REMANDED for further proceedings consistent with this opinion.
Notes
. Rodriguez raises a multiplicity challenge to these two charges of 18 U.S.C. § 922(g)(1). Because we reverse the district court's evi-dentiary determination, we do not address the multiplicity claim. However, since the government has conceded multiplicity, we do not anticipate a continuing problem with multiplicity on remand.
. Rodriguez does not pursue the Fourth Amendment issue on appeal.
. "Ambiguity means 'admitting more than one interpretation or reference' or 'having a double meaning or reference.' ” Anderson, at 787 (quoting The New Shorter Oxford English Dictionary (1993)).
. At the suppression hearing, Rodriguez attempted to introduce into evidence the results of a survey, posing a hypothetical scenario based on these facts, in which 53% of respondents in Clark County, Nevada believed that the words "I'm good for tonight” constituted an invocation of the right to remain silent. Even if we accept, arguendo, that such survey data was probative evidence of the meaning of the phrase, this particular survey, showing only the barest of majorities agreeing on an interpretation of the phrase, does not convince us that the phrase unambiguously invokes the right to silence.
. Rodriguez also argues that the holding of
Davis
does not apply to his case because
Davis
concerned an invocation of the right to counsel, whereas Rodriguez’s statement concerned his right to silence. Because we decide this case on other grounds, we decline to address this question. We note, however, that in four other cases this circuit has de-dined to address this question.
See Anderson,
at 787 n. 3;
Arnold v. Runnels,
. In holding that the "unambiguous or unequivocal request" rule of
Davis
is limited to the post-waiver scenario, we note that the majority of state supreme courts to consider the issue have reached the same conclusion.
See State v. Tuttle,
We acknowledge that a number of decisions have applied the
Davis
rule in a pre-waiver or initial waiver context,
see, e.g., United States v. Brown,
. The importance of prior waiver accords with the practical consequences that the Davis majority fears it would bring about if it were to decide that ambiguous statements might trigger Edwards duties:
The Edwards rule — questioning must cease if the suspect asks for a lawyer — provides a bright line that can be applied by officers in the real world of investigation and interrogation without unduly hampering the gath *1080 ering of information. But if we were to require questioning to cease if a suspect makes a statement that might be a request for an attorney, this clarity and ease of application would be lost. Police officers would be forced to make difficult judgment calls about whether the suspect in fact wants a lawyer even though he has not said so, with the threat of suppression if they guess wrong.
Davis,
