The petitioner, William Brady Trigg, appeals the dismissal of his petition for a writ of habeas corpus. After conducting a full evidentiary hearing, the district court found that Trigg had not been denied his right to a speedy trial and thus was not entitled to habeas corpus relief. Involved are the dimensions of the Sixth Amendment right to a speedy trial when asserted by a federal prisoner under a detainer for the alleged commission of a separate state crime. The facts of the litigation are lengthy and complicated but a summary of the pertient events is given below.

In July 1964 the petitioner was arrested in Chicago, Illinois, and charged with violating the Federal Narcotics Act. While the petitioner was free on bond in Chicago, he was indicted in November 1965 by the Grand Jury of Shelby County (Memphis) Tennessee for armed robbery. Trigg did not become aware of this indictment until several years later. In June of 1966, Trigg was convicted on the federal drug charges. He was sentenced to six concurrent twenty-year terms and incarcerated in the United States Penitentiary at Leavenworth, Kansas. It was not until September 1967 that the Tennessee officials discovered that Trigg had been so incarcerated. Upon communicating with prison authorities, Tennessee officials learned that Trigg was eligible for release in 1979 but was already subject to an Illinois detainer. The State of Tennessee promptly placed its own detainer on the petitioner.

Soon thereafter, Prison officials at Leavenworth informed Trigg of the Tenessee detainer. According to the petitioner's testimony, he wrote various Tennessee state officials inquiring about the detainer and the underlying charges. At some point, Trigg wrote the office of the Shelby County District Attorney. In March of 1968, an administrative assistant in this office replied to the petitioner's letter, informing him of the District Attorney's policy to return for trial all persons charged with committing state crimes in Shelby County. Nine months later, in January 1969, a motion was filed in Trigg's behalf to dismiss the state court charge against him on the ground that he had been denied the right to a speedy trial.

By letter dated February 11, 1969, the Shelby County District Attorney initiated what became protracted negotiations with the federal prison authorities for the return of Trigg to Tennessee to stand trial on the Shelby County indictment. For the next two years, officials of the state and federal government were deadlocked as to the appropriate legal procedure for the return of Trigg to Tennessee. First, because of claimed insufficient funds, the State was reluctant to pay for United States Marshals to accompany and guard Trigg on his trips to and from Tennessee and during his trial. Instead, Tennessee sought permission to use its own agents to transport Trigg. Secondly, the State wanted the petitioner to sign a waiver of extradition before it would endeavor to take custody of him. As early as May 27, 1969, the State was informed by the federal authorities that it was established policy that only United States Marshals could guard a federal prisoner while away from the institution and, furthermore, that it was unnecessary to require a waiver of extradition when proceeding under a writ of habeas corpus ad prosequendum. Nevertheless, the state officials persisted in their position that Trigg would be required to waive extradition. In the summer of 1969, federal prison authorities presented Trigg with the waiver form, but he refused to sign it.1

A few months later, Trigg commenced a federal habeas corpus action in the district court in Kansas, an action in which the Shelby County District Attorney's Office intervened. Trigg's petition was dismissed and the dismissal was affirmed on appeal.2 Trigg fared no better in Shelby County Criminal Court as his January 1969 motion to dismiss was summarily overruled the following October.3 During 1970, state efforts appear to have subsided but they were revived in the spring of 1971.

Apparently proceeding under the Interstate Agreement on Detainers Act (18 U.S.C. Appendix),4 the State finally succeeded in returning Trigg with its own agents,5 in the summer of 1971. He was then tried and convicted in the Tennessee state court on December 8, 1971, and he was given a ten year sentence to run concurrently with the federal and Illinois sentences. This conviction was affirmed a year later by the Tennessee Court of Criminal Appeals. In August 1973, the petitioner initiated the present habeas corpus action in the court below. The denial of relief by the district court resulted in the appeal now before us.

The Sixth Amendment to the United States Constitution provides that all criminal defendants are entitled to a speedy trial. In 1967 the requirement was held to be applicable to state criminal proceedings through the Fourteenth Amendment.6 Two years later, the Supreme Court held that a state must 'make a diligent, good-faith effort' to return a federal prisoner who demands a speedy trial of any pending State charges. Smith v. Hooey, 393 U.S. 374, 383, 89 S. Ct. 21, 575 L. Ed. 2d 607 (1969). In Barker v. Wingo, 407 U.S. 514, 92 S. Ct. 2182, 33 L. Ed. 2d 101 (1972), the Court made its most thorough examination of the right to a speedy trial. The Court eschewed an inflexible rule and instead adopted an ad hoc approach requiring the balancing of at least four factors: the length of the delay, the defendant's assertion of the right, the reason for the delay, and the prejudice to the defendant. Id. at 530, 92 S. Ct. 2182. The Court emphasized that none of these factors was 'either a necessary or sufficient condition to the finding of a deprivation of the right of speedy trial.' Id. at 533, 92 S.Ct. at 2193; see Moore v. Arizona, 414 U.S. 25, 26, 94 S. Ct. 188, 38 L. Ed. 2d 183 (1973). On the contrary, these were but four related factors to be considered along with all the other relevant circumstances. Barker, 407 U.S. at 533, 92 S. Ct. 2182. In order to assess the merits of the petitioner's claim, we must analyze the facts of this case in view of the Barker factors.

The parties disagree about the precise point in time when the right attached and from which the delay should be measured. We do not think it essential to our decision to resolve this dispute since the length of delay is primarily a 'triggering mechanism.' Barker, 407 U.S. at 530, 92 S. Ct. 2182. 'The passage of time in and of itself does not constitute denial of a speedy trial.' United States v. Beard, 381 F.2d 325, 328 (6th Cir. 1967); see United States v. La Borde, 496 F.2d 965 (6th Cir. 1974) (per curiam). When considering the type of crime involved, the delay must be long enough that some prejudice can be presumed. Barker, 407 U.S. at 530-531, 92 S. Ct. 2182, 33 L. Ed. 2d 101. Once this threshold determination has been made, the other mitigating or aggravating factors are weighed in order to decide the constitutionality of the delay. See Wallace v. Kern, 499 F.2d 1345, 1349-1350 (2d Cir. 1974). In this case the State of Tennessee admits to a delay of approximately two years.7 Because of the nature of the crime involved, we think that this delay is sufficiently long to compel the Court to examine the other factors relevant to the right to a speedy trial. Barker, 407 U.S. at 531, 92 S. Ct. 2182, 33 L. Ed. 2d 101.

The main reason for the lengthy delay was the State's effort to return the petitioner for trial at the least possible expense to itself.8 The duration of the delay was extended further by the State's inability to agree with the federal government about the proper legal procedure necessary to effectuate the return. The State of Tennessee urges that because the law with regard to speedy trial was unsettled during that period, it was uncertain about the scope of its duty to a federal prisoner. As a result, the State argues that it had neither the funds nor the methods to return the petitioner immediately upon his request. We note that the various state officials were not consistent in their efforts to gain custody of Trigg.9 While the lack of sufficient funds may have contributed to the delay, we cannot say that such lack was the sole reason. Cf. Beck v. United States, 422 F.2d 1037 (5th Cir. 1971). The State acted in good faith, but it did not make a particularly diligent attempt to settle its two year controversy with federal prison officials. Thus the State of Tennessee must bear the primary responsibility for the inordinate delay in returning the petitioner for trial.

There is no real dispute that the petitioner asserted his right to a speedy trial when he filed his motion to dismiss in the Shelby County Criminal Court.10 This formal motion, his earlier letters to state officials inquiring about the detainer, an alleged 'informal' motion to dismiss and a federal habeas corpus action brought in Kansas, all indicate Trigg's desire to exercise his right to a speedy trial. See generally Barker, 407 U.S. at 523-530, 92 S. Ct. 2182.

The remaining determination is the amount of prejudice suffered by the defendant because of the delay of his trial. Like the other criteria above, prejudice is to be weighed according to the factual circumstances of the case. Barker, 407 U.S. at 532-533, 92 S. Ct. 2182. Of the four factors to be assessed, prejudice to the defendant is the most critical one. United States v. Reynolds, 489 F.2d 4, 7 (6th Cir. 1973). 'Prejudice, of course, should be assessed in the light of the interests of defendants which the speedy trial right was designed to protect.' Barker,407 U.S. at 532, 92 S. Ct. 2182, 2193. These interests of the defendant are: to prevent oppressive pretrial incarceration; to minimize anxiety and concern of the accused; and to limit the possibility that the defense will be impaired. Ibid.

According to the Barker decision, the most important of these interests is the possible impairment of a defense. At the evidentiary hearing, Trigg testified that had he been brought to trial more promptly, he would probably have been able to establish his whereabouts during the period in question. Yet, this vague allegation of a potential alibi defense does not indicate any serious injury to the petitioner's interests.11 By contrast, the defendant in Dickey v. Florida, 398 U.S. 30, 90 S. Ct. 1564, 26 L. Ed. 2d 26 (1970), was definitely prejudiced by the death of his purported alibi witness who died during the long delay. In his motion to quash the information, Dickey alleged both the anticipated testimony and the specific identity of the deceased witness. Id. at 35 n. 5, 90 S. Ct. 1564; cf. United States v. Martinez, 498 F.2d 464, 465-466 (6th Cir. 1974).

The Supreme Court in Barker identified a second interest as the prevention of oppressive pretrial incarceration. This is inapposite here because the petitioner was already serving a federal sentence when he began to contest the state detainer. However, the Supreme Court has recognized that convicted defendants may suffer prejudice peculiar to their situation. First, an outstanding detainer may subject the defendant to tighter security or may foreclose him from receiving the benefits of parole and rehabilitation. See Strunk v. United States, 412 U.S. 434, 439, 93 S. Ct. 2260, 37 L. Ed. 2d 56 (1973); Moore, 414 U.S. at 27, 94 S. Ct. 188. According to the petitioner, he was deprived of better living accommodations and job training because of the Tennessee detainer. However, we find that he was also subject to an outstanding Illinois detainer that was only recently dismissed, several years after his trial on the Shelby County offense. Since there was no showing that two detainers were any more prejudicial to the petitioner's privileges and opportunities than a single one, we cannot attribute any significant prejudice to the mere existence of the Tennessee detainer.

A defendant already in prison also can be injured by a trial delay that prevents him from receiving a sentence at least partially concurrent with the one he is serving. See Smith, 393 U.S. at 378, 89 S. Ct. 575. We recognize that a defendant who is in prison has a significant interest in serving concurrently any other sentences he might have. However, in this case this is a matter of degree since Trigg's Tennessee sentence was made to run concurrently with his federal time. The petitioner's complaint is that had he been tried sooner, more of his sentence would have been served concurrently. We do not consider this claim to be unduly speculative in light of the Tennessee law at the time of sentencing.12 The petitioner was prejudiced in that he probably did lose some concurrent time, but he was not completely denied the possibility of concurrent sentences. See Smith, 393 U.S. at 378, 89 S. Ct. 575.

The last interest identified by the Supreme Court was the minimization of the anxiety and concern of the accused. Barker, 407 U.S. at 532, 92 S. Ct. 2182; see Smith, 393 U.S. at 379, 89 S. Ct. 575. This Court, of course, recognizes that an outstanding detainer may have a depressive effect upon a defendant, but in light of the Illinois detainer in this case, we find that only minimal prejudice was due to theTennessee indictment and detainer.

The petitioner was forced to wait at least two years for his trial because of the State's good faith but ineffective efforts to return him to Shelby County. There was no real justification for this delay and the defendant was probably prejudiced in some degree by it. Yet on balance we conclude that the petitioner was not denied his right to a speedy trial.13

Affirmed.