We conclude that the defendant has not made sufficient showing that Wiley was unavailable to testify, and that, in any event, Wiley's absence from trial was due more to the fortuity of his job assignments than to pretrial delay. State v. Johnson, supra, 546; State v. Troynack, 174 Conn. 89, 94, 384 A.2d 326 (1977); cf. State v. Jones, 46 Or. App. 479, 611 P.2d 1200, 1202 (1980). Moreover, even assuming an adequate showing of Wiley's unavailability, the substance of his purported testimony would not have materially assisted the defendant's case.