Donald Look, petitioner-appellant, appeals from the denial of his application for habeas corpus. Convicted of second degree murder in the Massachusetts court, Look complains that he was denied his right to a speedy trial under the sixth and fourteenth amendments to the Constitution of the *5 United States. Look also contends that the state trial court’s failure to instruct the jury on the lesser included offense of manslaughter violated his right to due process under the fourteenth amendment.
I. FACTS
We state the facts only to the extent necessary to understand the issues before us. 1 On January 28, 1974, Look fatally injured his wife with a shotgun. While Look admits to this, he has consistently maintained that the shooting wаs an accident which occurred while he was cleaning a gun used for hunting. On May 29, 1974, after a probable cause hearing, he was indicted for murder in the first degree. Thereafter, until March of 1975, the Plymouth County Superior Court, entertained numerous pretrial motions made by both parties. On March 17, 1975, the court granted Look’s motion to suppress certain statements made by his wife after the shooting, shortly before she died, tending to inculpate Look. 2 The Commonwealth applied to the Massachusetts Supreme Judicial Court on March 26, 1975 for an interlocutory appeal from the suppression order. On November 22, 1975, the Supreme Judicial Court dismissed the application for want of prosecution. The Commоnwealth’s failure to pursue this matter was part of a larger, continuing default from March 26, 1975 onward, for a period of some 31 months. During this period, the Commonwealth inexplicably did absolutely nothing in respect to Look’s case. Finally, on November 2, 1977 it moved to vacate the dismissal of the interlocutory appeal. That motion was denied on November 22, 1977. During the 31-month hiatus, Look himself, who was represented by experienced counsel and was not incarcerated, neither moved to dismiss the indictment, sought a trial, nor made any inquiry into the status of his case.
The Commonwealth finally came back to life on March 27, 1978, when it sought a trial assignment. Look responded on April 5, 1978 with a motion to dismiss for lack of a sрeedy trial, in which he asserted actual prejudice for the same reasons he now cites: inability to locate a defense witness, a Ms. Betty Roy; his own and other witnesses’ diminished recollections; and his anxiety and concern during the more than four-year pretrial period. This motion was denied, and the trial commenced on October 19, 1978, more than 56 months after his arrest.
The trial judge instructed the jury on first and second degree murder, though not on involuntary manslaughter. Look was convicted of second degree murder and given a mandatory life sentence. Look took a timely appeal to the Massachusetts Supreme Judicial Court, in which he raised the speedy trial issue. His conviction was affirmеd,
II. THE SPEEDY TRIAL ISSUE
Look’s sixth amendment claim depends on principles outlined in
Barker v. Wingo,
The length of the delay is both a “triggering mechanism” to determine whether balancing should oсcur, and a factor to be weighed when such is the case. Here the Commonwealth concedes the length of the delay went well beyond any threshold of “presumptive prejudice” needed to trigger the balancing.
There is also no doubt the delay was so lengthy that, as Justice Quirico wrote for the Supreme Judicial Court, it “is clearly to be weighеd against the Commonwealth, absent an adequate explanation . ... ”
Commonwealth v. Look,
Indeed, no glimmer of a reason for the core delay has even been presented. The Commonwealth suggests, in argument, that it simply forgot about the case. The state trial judge ascribed the delay to “negligence” but not to deliberate misconduct. In
Barker,
the Supreme Court characterized negligence as a “more neutral reason” for delay, that “should be weighted less heavily” against the government than a deliberate delay to gain advantage or “hamper the defense,” but nevertheless one that should be counted against it because “the ultimate responsibility for such circumstances must rest with the government rather than with the defendant.”
Barker,
The third factor is the extent to which the defendant asserted his right to a speedy trial. In
Barker,
the Supreme Court rejected the concept that a defendant’s failure to demand a trial amounts to a waiver of his sixth amendment speedy trial right.
The defendant’s assertion of his speedy trial right, then, is entitled to strong evi-dentiary weight in determining whether the defendant is being deprived of the right. We emphasize that failure to assert the right will make it difficult for a defendant to prove that he was denied a speedy trial.
Here Look remained silent throughout the Commonwealth’s long delay. He made no inquiry as to the status of his ease, nor did he move for dismissal or trial, apparently “ ‘gambling’ that the Commonwealth had forgotten about him or decided not to pursue his case.”
Commonwealth v. Look,
379 Mass, at 900,
The final factor to be considered under Barker v. Wingo is potential prejudice to the defendant. Look asserts three grounds of prejudice: the unavailability of a potential defense witness, the failure of memory of all witnesses, and Look’s personal anxiety caused by the existence of outstanding charges against him.
In Barker, the Supreme Court noted that prejudice to a defendant’s ability to conduct a defense is the most serious type of prejudice. Unavailability of a witness and failure of memories could undoubtedly result in such prejudice in some cases. Though this is true, the particular circumstances of each case must be examined to see if any actual prejudiсe resulted.
The unavailable witness, Betty Roy, was alleged to have been a good friend of the Looks and to have visited them in 1972 and briefly in November 1973. As the Supreme Judicial Court said, “Ms. Roy did not observe any of the factors or circumstances directly surrounding the alleged shooting,”
Commonwealth v. Look,
Look’s other concern over failed memories centers on some investigating officers’ inability to remember facts concerning the presence and location of cleaning materials and the rusted condition of the shotgun. We have examined the record, and to the extent that these matters and others relating to memory are relevant, the jury had ample photographic evidence and other testimony. There was strong evidence of the presence of oil on the gun and oil and cleaning implements on the table after the shooting. Indeed, the Commonwealth did not deny the presence of the cleаning materials. The prejudice resulting, if any, from failed memories on these matters was trivial.
Look also claims as prejudice his anxiety and concern over the outstanding charges against him. In
United States v. MacDonald,
The speedy trial guarantee is designed to minimize the possibility of lengthy incarcеration prior to trial, to reduce the lesser, but nevertheless substantial, impairment of liberty imposed on an accused while released on bail, and to shorten the disruption of life caused by arrest and the presence of unresolved criminal charges.
Id.
at 8,
The balancing of the appropriate factors identified above is more judicial аrt than science; no calculus exists to tell this court with precision the weights to assign the various factors, nor is it likely that such a calculus could be devised. On these facts, the two most salient features are the Commonwealth’s negligent 31-month silence and the silence of Look. In
United States v. Johnson,
Against these concerns is balanced a 31-month delay caused by negligence sandwiched in the middle of a total delay of 56 months. While the issue is close, we believe the сomplete silence on Look’s part outweighs the negligent delay of the Commonwealth, and that the other factors in Look’s favor are insufficient to tip the scales back. At least in the circumstances here — the defendant being at liberty and without complaint — anxiety over the existence of the unresolved charges seems the leаst compelling of the core concerns of the sixth amendment. Here there was lacking the simplest and most obvious manifestation of anxiety one seeking speedy resolution of charges might be expected to show — some inquiry into the status of the case, or some suggestion that a trial was wanted, the sooner the better. The lack of signifiсant prejudice to Look’s defense by reason of the passage of time, coupled with Look’s failure to inquire into the status of the case, weigh more heavily than the length of the negligent delay and any anxiety experienced by Look. In so saying, we do not, as appellant argues, reintroduce the demand-waiver doctrine by the baсk door. Had Look’s ability to defend himself been more heavily prejudiced, had the state acted in bad faith, or had Look been subjected to greater pretrial infringement of his liberty, one or more of these factors might well have outweighed Look’s failure to speak out. But in the present circumstances, we do not think Look is entitled to prevail.
III. THE LESSER INCLUDED OFFENSE ISSUE
While it is true that no instruction was given regarding lesser included of
*9
fenses, this was due to the acquiescence of Look’s counsel who said to the court, “I would be willing to state on the record, your Honor, that this case could go to the jury on the question of murder only.” Look argues that the subsequent case of
Beck v. Alabama,
Denial of petitioner’s application for ha-beas corpus is affirmed.
Notes
. The facts relevant to Look’s speedy trial claim were described, first, in the state trial judge’s ruling on Look’s motion to dismiss for lack of a speedy trial; second (and very fully) in Justice Quirico’s comprehensive opinion for the Massachusetts Supreme Judicial Court,
Commonwealth v. Look,
. Suppression was granted on the ground, inter alia, that the statements were not dying declarations. We do not agree with Look that the Commonwealth acted with impropriety in calling these statements, which are part of the record, to our attention in connection with its argument that the taking of an interlocutory apрeal was justified and that the time initially consumed for the appeal should not be counted against the Commonwealth.
. The docket entries reveal that Look’s attorney filed numerous pretrial motions, leading up to the successful motion in limine that caused the trial court to suppress highly damaging remarks by Look’s wife made just before she died. After thе Commonwealth’s period of forgetfulness, when it again took up his case, Look’s same attorney quickly moved to dismiss on speedy trial grounds.
. A private investigator did, in fact, interview her in 1974, after the shooting. He turned her statement over to Look’s counsel who objected to the prosecution’s looking at it when the latter sought to do so at a heаring in 1978.
. At oral argument, the bench asked Look’s counsel whether Look had been incarcerated prior to trial and counsel answered that he had been free on bail. Counsel for the Commonwealth stated at oral argument that Look had never been required to post bail. In any event, Look asserts as prejudice only his anxiety and concern, and not any further imposition on liberty such as a burdensome bail.
