(1) Upon written request by the defense, the attorney for the Commonwealth shall disclose the substance, including time, date, and place, of any oral incriminating statement known by the attorney for the Commonwealth to have been made by a defendant to any witness, and to permit the defendant to inspect and copy or photograph any relevant (a) written or recorded statements or confessions made by the defendant, or copies thereof, that are known by the attorney for the Commonwealth to be in the possession, custody, or control of the Commonwealth, and (b) results or reports of physical or mental examinations, and of scientific tests or experiments made in connection with the particular case, or copies thereof, that are known by the attorney for the Commonwealth to be in the possession, custody or control of the Commonwealth, and (c) upon written request by the defense, the attorney for the Commonwealth shall furnish to the defendant a written summary of any expert testimony that the Commonwealth intends to introduce at trial. This summary must identify the witness and describe the witness's opinions, the bases and reasons for those opinions, and the witness's qualifications.

(2) On motion of a defendant the court may order the attorney for the Commonwealth to permit the defendant to inspect and copy or photograph books, papers, documents, data and data compilations or tangible objects, or copies or portions thereof, that are in the possession, custody or control of the Commonwealth, upon a showing that the items sought may be material to the preparation of the defense and that the request is reasonable. This provision authorizes pretrial discovery and inspection of official police reports, but not of memoranda, or other documents made by police officers and agents of the Commonwealth in connection with the investigation or prosecution of the case, or of statements made to them by witnesses or by prospective witnesses (other than the defendant).

(4) It is not a defense against untimely disclosure of evidence under this rule that the party failing to provide timely disclosure only recently formed the intent to introduce such evidence unless it can be demonstrated, by clear and convincing evidence, that: (1) it could not, in a timely fashion, have reasonably foreseen a need to introduce the evidence and (2) that such untimely disclosure will not unfairly prejudice the opposing party.

(5) Except for the Commonwealth's obligation to provide exculpatory evidence to the defendant, none of the provisions of this rule regarding disclosure of evidence relating to expert testimony shall be deemed to have been violated unless and until the party offering the evidence attempts to introduce it at trial and the opposing party timely objects.

(6) If the case has been set for trial, a request for relief until this rule shall be made a reasonable time in advance of the trial date, and the granting of a continuance by reason of such request shall lie within the sound discretion of the court.

(7) An order granting relief under this rule shall specify the time, place, and manner of making the discovery and inspection permitted and may prescribe such terms and conditions as are just.

(8) On a sufficient showing the court may at any time order that the discovery or inspection be denied, restricted or deferred, or make such other order as is appropriate. On motion the court may permit the Commonwealth to make such showing, in whole or part, in the form of a written statement to be inspected by the court privately; and if the court thereupon grants relief following such private inspection the entire text of the Commonwealth's statement shall be sealed and preserved in the records of the court to be made available to the appellate court in the event of an appeal by the defendant.

(9) One (1) motion shall exhaust the relief available to the movant under this rule, except that a subsequent motion may be sustained on a showing of just cause.

(10) If subsequent to compliance with an order issued pursuant to this rule, and prior to or during trial, a party discovers additional material previously requested which is subject to discovery or inspection under the rule, that party shall promptly notify the other party or the other party's attorney, or the court, of the existence thereof.

(11) If at any time during the course of the proceedings it is brought to the attention of the court that a party has failed to comply with this rule or an order issued pursuant thereto, the court may direct such party to permit the discovery or inspection of materials not previously disclosed, grant a continuance, or prohibit the party from introducing in evidence the material not disclosed, or it may enter such other order as may be just under the circumstances.