Fоllowing a five-day jury trial, defendant Walter Jackson was convicted of possession of a firearm by a convicted felon under 18 U.S.C. § 922(g)(1). 1 Under the Armed Career Criminal Act, 18 U.S.C. § 924(e), Jackson was sentenced to serve fifteen years in prison. On appeal, he asserts that the district court committed reversible error in refusing to suppress the firearm, in permitting the government to withhold the identity of its informant, and in admitting into evidence post-arrest statements which Jackson made to law enforcement officers. Lastly, Jackson maintains that he was denied effective assistance of counsel. As we conclude that all claims are without merit, we affirm.
I
After receiving neighborhood reports concerning suspicious activity at a residence in Hyannis, Massachusetts, local police established an intermittent surveillance which confirmed that various persons, among them convicted felons known to have had past involvement with illegal drugs, frequently would drive up to the residence, enter for short periods, then drive away. During the evening of March 8, 1988, Jackson, known to the police as a convicted felon with an extensive criminal record that included drug law violations, was observed entering the residence. Soon after, the police learned from a confidential informant that Jackson had been seen conducting a drug transaction inside the same residence and that he was in possession of a handgun.
While оn surveillance the following evening, the police received information from *238 the same informant that Jackson again had been observed selling cocaine inside the Hyannis residence, while in possession of a gun. At approximately 1:30 a.m., Jackson was observed leaving the residence in the company of a male, later identified as Anthony Edwards, and a female, Stephanie Holmes, Jackson’s sister. The three entered a vehicle and began to leave, with Jackson driving. Two police cruisers, their blue lights flashing, pulled up behind the Jackson vehicle which then took what could be considered evasive action. The police cruisers blocked the Jackson vehicle and approached it with weapons drawn. As they did so, the police saw Jackson and Edwards make furtive hand movements in the front seat. The police ordered the occupants to place their hands on the dashboard. The suspeсts did not immediately comply.
The police ordered Edwards out of the car, pat-frisked him, and discovered a small packet containing a white substance which Edwards identified as cocaine. Edwards, Jackson and Holmes were arrested. Edwards and Jackson were handcuffed and placed in the back of a police cruiser. The police then searched the passenger compartment of the vehicle and seized the firearm here in question, аnd a small baggie of cocaine, from inside the console between the front seats. After Jackson was arrested and administered
Miranda
warnings,
see Miranda v. Arizona,
II
Jackson asserts that the district court erroneously denied the motion to suppress the firearm. He argues that the police lacked probable cause to arrest him; therefore the evidence discovered during the automobile search conducted after the unlawful arrest must be suppressed as the tainted fruits of the unlawful arrest.
See Wong Sun v. United States,
These police actions — blocking the Jackson vehicle and frisking Edwаrds — did not transcend an investigatory stop.
See Terry v. Ohio,
There is no evidence that anything that occurred prior to the formal arrest of Edwards and Jackson was inconsistent with a valid investigatory stop. Although the government concedes that the police stopped the vehicle for the purpose of arresting Jackson, the officers’ intention, in itself, would not convert an investigatory stop into an arrest.
Vargas,
We now examine whether the vehicle search incident to the investigatory stop was reasonable under the
Terry
doctrine. Our review is directed at two inquiries: first, whether the investigatory
*239
stop was justified at its inception; second, whether the conduct of the officers, after the stop and prior to any arrеst, was “reasonably related in scope to the circumstances which justified the interference in the first place.”
United States v. Sharpe,
An investigatory stop is permissible on a reasonable suspicion that a “person
has been,
is, or is about to be engaged in criminal activity.”
United States v. Hensley,
The
Hensley
standard was satisfied in the present case. Although the police possessed no eyewitness evidеnce of criminal activity, except through their informant, “a series of acts, each of them perhaps innocent,” may, “taken together,” raise a reasonable suspicion warranting further investigation.
United States v. Sokolow,
Whether or not the cogency of the information possessed by the police prior to the investigatory stop amounted to probable cause for Jackson’s arrest, as the district court found, there can be no doubt that it raised the requisite reasonable suspicion for an investigatory stop. See
id.
We conclude, furthermore, that the nature and scope of the police actions, subsequent to the lawful investigatory stop and prior to any arrest, were reasonably related to the suspicious circumstances which warranted the stop.
See Michigan v. Long,
Once the Hyannis police discovered the cocaine concealed on Edwards’s person there was probable cause to arrest Edwards, and the police were permitted to search the passenger compartment of the automobile in which Edwards was a passenger.
New York v. Belton,
Ill
Jackson asserts that' the district сourt abused its discretion by refusing to compel the government to divulge the identity of its informant.
See United States v. De Los Santos,
The Supreme Court has never determined that due process requires disclosure of an informant’s identity at a suppression hearing; rather, the defendant’s interest in disclosure at the suppression stage is less than at trial.
See United States v. Raddatz,
Where an informant’s tip is employed not to weigh guilt, or even probable cause for a warrantless arrest, but simply to determine whether there was sufficient suspicion to warrant an investigatory stop, a defendant’s legitimate interest in the identity of the informant must be considered commensurately reduced. We find no reason to disturb the district court’s decision to deny disclosure in these circumstances.
IV
We next consider whether certain admissions were coerced in violation of Jackson’s constitutional rights.
5
Jackson admitted to law enforcement officers that he owned the bag, containing the cocaine and the firearm, which was seized from the console. Although Jackson admitted that the cocaine also belonged to him, he told the police that the firearm did not, but that Edwards had put it in the bag just prior to the stop. Jackson claims that these statements were involuntary, hence inadmissible, because the police exerted psychological pressure by informing him, during an interrogation about the ownership of the firearm, that his sister was under arrest for a gun violation.
See Townsend v. Sain,
An involuntary statement violates due process and its admission into evidence mandates vacation of the conviction even though other evidence in the case would have been sufficient to cоnvict.
Jackson v. Denno,
The burden rests with the government to prove voluntariness by a preponderance of the evidence,
Lego v. Twomey,
Jaсkson’s involuntariness claim is based exclusively on the contention that news of his sister’s arrest exerted psychological pressure sufficient to overcome his will and coerce the admission that he owned the bag in which the cocaine and gun were found. Our review convinces us that Jackson’s statements were voluntary.
As the Supreme Court indicated almost a century ago, in a case still cited as controlling precedent on the voluntariness of confessions, fоr a confession to be voluntary it “must not be extracted by any sort of threats or violence, nor obtained by any direct or implied promises, however slight,
*242
nor by the exertion of any improper influence ... ”,
United States v. Bram,
In the instant case there is no evidence that Jackson was subjected to direct threats or promises. Moreover, even if we were to assume that the police did use an implied “threat” or “promise” that Jackson’s sister might be caused or spared harm, depending on whether or not Jackson admitted ownership of the firearm, we still could not conclude that his will was overborne. Although
Bram
has not been overruled, it has been modified. The Congress and the courts have indicated that to determine voluntariness it is necessary to look at the totality of the circumstances,
including
any promises or threats made by police officers or the prosecution, in order to see whether the will of the accused was overborne.
See, e.g., Bryant v. Vose,
Jackson relies in particular on
Lynumn v. Illinois,
V
The defendant lastly asserts a sixth amendment ineffective assistance claim based on trial counsel’s failure to object, or to request a cautionary instruction, when the prosecutor mentioned, during the government’s opening statement, that the сonfidential informant had told a police officer that Jackson was involved in a drug transaction at the Hyannis house on the night of the arrest. The district judge immediately interrupted and, at a brief sidebar conference with counsel, again admonished the prosecutor not to relate further hearsay information from the confidential informant. 8
*243
Although most ineffective assistance claims “require the independent development of evidence outside of, and сollateral to, the criminal proceeding,” we recognize that some ineffective assistance claims are reviewable on the trial record alone.
Brien v. United States,
A sustainable “ineffective assistance” claim “must show that [the] attorney’s performance was deficient and ... that [that] deficiency prejudiced [the] defense.”
United States v. Walters,
First, defense counsel’s failure to object to the prosecutor’s remark and to request a curative instruction seems consistent with а reasonable tactical decision to minimize any harm the prosecutor’s remark may have caused, by not inviting further attention to it.
See Strickland,
There was no need for defense counsel to object. The district court, on its own initiative, immediately interrupted the prosecutor’s opening statement. At sidebar, the court left no doubt that there was to be no recurrence of the prosecutor’s conduct. Thus, the court accomplished all that an objection by defense counsel could have achieved, but without unnecessarily highlighting the prоsecutor’s improper statement to the jury. In these circumstances we cannot say that it was not a reasonable trial tactic on the part of defense counsel to opt against highlighting the informant’s tip by effectively prompting its reiteration in the course of a curative instruction.
The second element in the
Strickland
test entails the establishment of “ ‘a reasonable probability that, but for counsel's unprofessional errors, the results of the proceeding would have been different.’ ”
Walters,
The district court judgment is affirmed.
Notes
. It shall be unlawful for any person who ... has been convicted in any court of a crime punishable by imprisonment for a term exceeding one year ... to ... possess in or affecting commerce, any firearm ... which has been shipped or transported in interstate or foreign commerce.
18 U.S.C. § 922(g)(1).
. Jackson argues that the information provided by the informant should not be considered because there was no showing that the informant was credible or reliable. On the contrary, the district court found that the informant had supplied "specific, detailed information” in the past and was a source whom the police had good reason to regard as “reliable.” There is nothing in the record to suggest that this finding was clearly erroneous.
See United States v. Cruz Jimenez,
Jackson contends that the magistrate, at the suppression hearing, improperly limited the scope of cross-examination aimed at obtaining disclosure of the informant’s identity for the purpose of testing his reliability.
See
Section III
infra.
We find no error. The government has an important interest in maintaining the confidentiality of its informers' identities. Further, a defendant’s legitimate interest in testing the reliability of the informant is mоre limited in these circumstances, because "a lesser showing of the reliability of an informant is required to support the reasonable suspicion which is a prerequisite for an investigatory stop than is needed to support probable cause for a search [or an arrest].”
United States v. Childress,
. Although we conclude that the validity of the vehicle search is independently based, the informant’s credibility and reliability bear on the evidentiary predicate for the Terry stop as well.
. Jackson relies entirely on
Roviaro v. United States,
Jackson simply avers that disclosure of the informant’s identity
might
indicate that the infоrmant provided unreliable information to the police. There is no clue to the rationale, much less a proffer of evidence, supporting Jackson’s conjecture. Even in a trial setting, "mere speculation as to the usefulness of the informant's testimony to defendant is insufficient to justify disclosure of his identity.”
United States v. Es-trella,
. Jackson made statements to law enforcement officers on two occasions: to the lоcal police, shortly after his arrest; and, later, to an agent of the Bureau of Alcohol, Tobacco and Firearms. Jackson argues that the statements made on the first occasion were involuntary and that the later statements were "fruits of the poisonous tree.”
See Wong Sun,
. For instance, in
Lynumn,
. We agree with the district court that Jackson’s involuntariness claim more closely resembles those unsuccessfully raised in other cases merely on the strength of a stated desire to protect a loved one.
See United States v. Jordan,
.Jackson suggests that the challenged statement amounted to prosecutorial misconduct because it was a "deliberate mischaracterization” of the confidential informant’s report. We find no mischaracterization. Nevertheless, in view of the fact that the prosecutor was forbidden by the court, in advance, from making any reference in his opening statement to anything the *243 informant told the officers, there can be no doubt that the prosecutor should have steered well clear of these remarks.
We review only for "plain errоr,” due to Jackson’s failure to object at trial.
See
Fed.R. Crim.P. 52(b);
United States v. Paz Uribe,
