*237 OPINION OF THE COURT
This is а direct appeal from judgments of sentence imposed by the Court of Common Pleas of Philadelphia on convictions of murder of the first degree and possession of an instrument of crime. For the reasons set forth below, we affirm. 1
Viewed in the light most favorable to the Commonwealth as verdict winner, the evidence establishes that on December 23, 1977, appellant became involved in an argumеnt with Frances Hood, a woman with whom he was living. During the argument, appellant first attempted to push Ms. Hood out of a window. He then killed her by stabbing her repeatedly in the neck and chest, and fled the scene.
Appellant was arrested on January 25, 1978, on an unrelated charge, at which time he gave police a fictitious name. Upon determining appellant’s true identity, police discovered that there existed two outstanding warrants for appellant’s arrest on charges of murder, including the murder of Frances Hood. Following conviction by a jury, post-verdict motions were denied. Appellant was sentenced to life imprisonment for the murder and a concurrent term of two and one-half to five years for the weapons offense. This appeal followed.
Appellant advances numerous contentions in support of his argument that two incriminating statements made to police shortly after his arrest should have been suppressed. He first claims that his warrantless arrest was invalid because it was not based upon probable cause. He does not contend that the Commonwealth’s evidence, if believed, fails to establish probable cause, but rather that the police version of thе arrest was fabricated and that his version of the arrest should be believed. According to the Commonwealth, on January 25, 1978, a woman named Ruby Blocker approached a Philadelphia police officer and told him that she had been stabbed and held hostage by appellant. The stab
*238
wounds were visible to the officer. She further informed the officer that appellant was wanted for two murdеrs and that he was at that time fleeing in a brown Hornet automobile. The officer and Ms. Blocker then pursued the vehicle, which was still in sight. After a chase, appellant was apprehended by other officers who had heard the broadcast of appellant’s description and location over police radio. Seconds later, Ms. Blocker positively identified appellant as her аssailant. This evidence clearly establishes that there were facts available to the arresting officers which would justify the belief of a reasonable person that a crime had been committed and that appellant was the perpetrator. See
Betrand Appeal,
Appellant contends that he was in fact arrested simply because he had vomited on the sidewalk. The suppression court rejеcted appellant’s version of the arrest as incredible and credited the testimony of police. Resolution of questions of credibility is for the trier of fact, and where, as here, that resolution is based upon credible evidence, it will not be disturbed on appeal.
Commonwealth v. Whack,
Appellant next contends that he was interrogated prior to receiving his
Miranda
warnings and that this interrogation tainted all subsequent statements made by appellant. Appellant’s contention is based on the fact that, while appellant was being transferred to the homicide unit after his identification as Walter Penn, a police officer with him said, “Hey, you’ve been involved in other murders,” to which appellant responded, “Yeah, I was involved in a homiсide in Pittsburgh.”
2
Whether the officer’s statement constituted interrogation, as appellant claims, or was simply a gratuitous remark, as the Commonwealth contends, is immaterial. Appellant’s response, which merely confirmed a fact of record, was not introduced at trial. Indeed, all references to
*239
this prior homicide in appellant’s subsequent statements were carefully redacted beforе those statements were introduced into evidence. Moreover, appellant has not shown that police in any way exploited this brief exchange of remarks in the subsequent interrogation of appellant, which was preceded by appropriate
Miranda
warnings. See
Wong Sun
v.
United States,
Appellant next contends that because he was in a drugged and intoxicated condition when he was arrested, he lacked suffiсient mental capacity to waive his right to remain silent. This contention was resolved against appellant by the suppression court on the basis of credible evidence, including the fact that appellant possessed the presence of mind to conceal his true identity from police at the time of his arrest. Accordingly, this determination of the suppression court will not be disturbed on appeal. See
Commonwealth v. Holly,
Appellant further argues that his incriminating statements should have been suppressed because there was unnecessary delay between his arrest and arraignment and because police failed to rewarn him of his
Miranda
rights prior to taking his statements. Appellant was arraigned five hours and twenty minutes after his arrest. Thus, he does not argue that his statements should be excluded on the basis of
Commonwealth v. Davenport,
Appellant next contends that eyewitness Juan Henderson, the twelve-year-old son of the victim, should have been found incompetent to testify because he displayed some confusion about dates and locations and did not know the meaning of the word “oath.” The standards for determining the competency of a child to testify are set forth in
Rosche v. McCoy,
“There must be (1) such capacity to communicate, including as it does both an ability to understand questions and to frame and express intelligent answers, (2) mental capacity to observe the occurrence itself and the capacity of remembering what it is that [he] is called to testify about and (3) a consciousness of the duty to speak the truth.”
Accord,
Commonwealth v. Fox,
Appellant next challenges the testimony of the Reverend Larry Falcon that, within half an hour of the murder, Juan Henderson told him that appellant had killed his mother. Appellant maintains that the trial court erroneously held the testimony admissible as an excited utterance under the res gestae exception to the hearsay rule. See
Commonwealth v. Cooley,
“ ‘a spontaneous declaration by a person whose mind has been suddenly made subject to an overpowering emotion caused by some unexpected and shocking occurrence, which that person had just participated in or closely witnessed, and made in reference to some phase of that occurrence which he perceived, and this declaration must be made so near the occurrence in both time and place as to exclude the likelihood of its having emanated in whole or in part from his reflеctive faculties.’ ”
*242
Reverend Falcon testified that Juan was visibly upset and shaken when he returned with the police, and it is reasonable to conclude that the boy had been continuously upset since witnessing the stabbing of his mother. The fact that the boy’s statement was not made immediatеly after the stabbing does not preclude its spontaneity. See
Commonwealth v. Cheeks,
supra,
Appellant next argues that the trial court erroneously denied his request for a mistrial because a question asked by the prosecutor during crоss-examination of appellant allegedly suggested prior criminal activity by appellant. Throughout both direct and cross-examination, appellant maintained that, because of his ingestion of drugs and alcohol, he could not remember any of the events that took place on the day of the murder. As a result, the prosecutor attempted to impeach appellant’s alleged lack of memory with the two written statements which appellant had given to police on the day of his arrest. After appellant had testified that he had not known that the victim was dead until told so by detectives after his arrest, the following exchange occurred:
Q. [By Assistant District Attorney]:
Do you remember being asked this question and giving the following — (reading):
“Question: Did you ever go back to the house after you stabbed Frankie?
*243 Answer: I went back twice. I didn’t have no keys. I couldn’t get in. I didn’t know Frankie was dead. I called University of Pennsylvania Hospital and asked how she was. They said they couldn’t give me no information over the phone, they wanted me to come down, they asked me for my name. I wouldn’t give it to them. I would hang up. I had other people call also.”
A. Not all — I said I didn’t know Frankie was dead. I had called to inquire, and I—
Q. Do you remember this — (reading):
“Question: Who did you have call?
Answer: I don’t want to name them, if I get them in trouble, they will be an accessory after murder.
Look, I watched TV, news, radio, read the papers, and I didn’t see nothing about her dying. I also asked some people in the neighborhood, some said she was dead, some said they saw her. I just was messed up on the whole thing.”
Which murder were you talking about?
THE DEFENDANT: Which murder?
MR. FITZPATRICK [Defense Counsel]: I object, Your Honor, only one murder.
THE COURT: Talking about this case.
Defense counsel’s motion for a mistrial was denied, as was his request for a curative instruction.
Appellant concedes that the prosecutor was not referring to appellant’s prior murder conviction, but rather was seeking to probe appellant’s use of the word “murder” in his statement to police. This Court has held that a reference to other criminal activity will be found prejudicial “only if the testimony conveys to the jury, either expressly or by reasonable implication, the fact of a prior criminal offense.”
Commonwealth v. Povish,
Appellant next contends that the Commonwealth improperly impeached a defense witness with evidence of а prior robbery conviction. It is well settled that a witness may be impeached on the basis of a prior conviction only if the crime involves dishonesty or false statement.
Commonwealth v. Burton,
Appellant additionally complains that this same defense witness was improperly impeached with a рrior robbery arrest that did not result in conviction. Although an arrest without conviction may never be the basis of impeachment,
Commonwealth v. Jackson,
Appellant raises several allegations regarding the partiality of his jury, none of which has merit. He first contends that the trial court erred in denying a defense motion for a mistrial when, during voir dire, one prospective juror informed the court that she had overheard two other prospective jurors discussing the case. It is clear from the record that none of these three prospective jurors was seated on appellant’s jury. All remaining venirepersons replied in the negative when asked by the court whether they had heard anyone discuss the case or whether they had discussed it themselves. Thus, appellant’s requеst for a mistrial was properly denied. See
Commonwealth v. Brantner,
*245 Appellant next argues that because a strike in the sheriffs office temporarily prevented appellant from being present at voir dire, prospective jurors could have inferred that he was incarcerated. Appellant also contends that, during the jury’s deliberation, one of the jurors may have observed appellant in handcuffs by loоking out a window, across a courtyard, and through another window. As the record provides no support for either of these contentions, they must be rejected.
Appellant claims that the trial court erred in refusing to grant his request for a mistrial when the trial court prefaced its additional charge to the jury on the possible legal effects of intoxication with the words “whether you need it or not.” In its initial chаrge to the jury, the court had explained in detail the legal effect of intoxication on a finding of intent to kill. When the jury requested that the court “repeat the charge concerning first and third degree murder,” the court complied, after which defense counsel asked the court to repeat its charge on the effect of intoxication. Acceding to this request, the court began: “Although I have given you the definitions of first and third degree murder, it may be relevant to go into another phase, whether you need it or not.” The court then elaborately reinstructed the jury on the effect of alcohol and drugs. When the charge is viewed in its entirety, as it must be,
Commonwealth v. Fell,
Appellant next contends that his trial counsel was ineffective in failing to move for a mistrial when the jury announced that it was deadlocked after two days of deliberation. It is well settled that “[t]he length of the deliberation of a jury is wisely left to the sоund discretion of the trial Judge and we reverse only if we find . .. abuse of
*246
discretion, or that the verdict was the product of coercion or of an overworked and fatigued jury.”
Commonwealth v. Campbell,
So, too, we reject appellant’s claim that his trial counsel was ineffective in failing to raise in post-verdict motions the application of Pa.R.Crim.P. 308(a). Prior to January 1,1978, this rule stated that the failure to answer a pre-trial motion was deemed an admission of the facts averred in the motion. The rule was amended to its present form on June 29, 1977, effective as to all cases where the indictment or information is filed on or after January 1, 1978:
“(a) No answer to a pretrial motion is required unless ordered by the court. Failure to file an answer shall not constitute an admission of the well-pleaded facts averred in the motion unless an answer has been ordered by the court. Any answer shall be filed not later than seven (7) days after service of a pretrial motion, or within the time directed by the court.”
Pa.R.Crim.P. 308(a). As appellant’s informations were filed on February 9, 1978, the former rule had no application to
*247
appellant’s trial, and a motion seeking the enforcement of the former rule would properly have been denied. It is settled that counsel will not be held ineffective for failing to raise a meritless claim.
Commonwealth v. Rice,
Appellant’s contention that the verdict is against the weight of the evidence must also fail. On the basis of appellant’s incriminating statements and the testimony of eyewitness Juan Henderson, the jury could clearly have found beyond a rеasonable doubt that appellant was guilty of murder of the first degree and possession of an instrument of crime. See, e.g.,
Commonwealth v. Fairell,
Appellant’s remaining contentions, that the trial judge displayed bias against appellant and his counsel, and that trial counsel was ineffective in failing to object to certain leading questions posed by the prosecutor, are without support on the record and are therefore rejected.
Because we conclude that none of appellant’s allegations of error warrants the granting of relief, we affirm judgments of sentence.
Judgments of sentence affirmed.
Notes
. This case was reassigned to the present writer on January 4, 1982.
. The homicide to which appellant referred was the murder of his common-law wife, of which he had been convicted in 1966.
. These guidelines were specifically approved by this Court in
Commonwealth v. Spencer,
