his release from” WSH (ER 8), and that he had relapsed into his paranoid schizophrenic state at the time he allegedly attempted to murder Ramona Bennett (ER 8). He alleged that his trial attorney knew of his stay at WSH before the trial, but did not review his medical records or prepare a defense based on mental state, and failed to present evidence of his mental state to the jury (ER 8-9). Burrows’ current attorney submitted an affidavit stating that Burrows’ doctors at WSH would have testified at trial that Burrows would have probably suffered a relapse of his paranoid schizophrenia if he stopped taking the drugs, did not seek outpatient treatment or consumed an excessive amount of alcohol (CR 340 at Affidavit of Shorett). Burrows also included affidavits from nine of his friends to show that he had become withdrawn, suffered from memory loss and severe mood swings, and could not carry on a logical conversation after he left WSH (CR 340 Appendix).
II
This court reviews the denial of a motion under section 2255 de novo. United States v. Espinoza, 866 F.2d 1067, 1069 (9th Cir.1988). A claim of ineffective assistance of counsel is a mixed question of law and fact which this court reviews de novo. United States v. Birtle, 792 F.2d 846, 847 (9th Cir.1986).
III
Section 2255 requires the district court to hold an evidentiary hearing “[ujnless the motions and files and records of the case conclusively show that the prisoner is entitled to no relief.” 28 U.S.C. § 2255, Espinoza, 866 F.2d at 1069. An evidentiary hearing is usually required if the motion states a claim based on matters outside the record or events outside the courtroom. Watts v. United States, 841 F.2d 275, 277 (9th Cir.1988); Marrow v. United States, 772 F.2d 525, 526 (9th Cir.1985). The district court may deny a section 2255 motion without an evidentiary hearing only if the movant’s allegations, viewed against the record, either do not state a claim for relief or are so palpably incredible or patently frivolous as to warrant summary dismissal. Id.; Baumann v. United States, 692 F.2d 565, 570-71 (9th Cir.1982). A judge may supplement the record with his “recollection of the events at issue” and then summarily dismiss a section 2255 motion. Blackledge v. Allison, 431 U.S. 63, 74 n. 4, 97 S.Ct. 1621, 1629 n. 4, 52 L.Ed.2d 136 (1977); Gustave v. United States, 627 F.2d 901, 903 (9th Cir.1980).
Burrows’ claims raise facts which occurred out of the courtroom and off the record. Accordingly, the district court should have held an evidentiary hearing unless something in the record conclusively shows that Burrows’ trial attorney was not ineffective. See Espinoza, 866 F.2d at 1069; Watts, 841 F.2d at 277.
This court applies the two-tiered test which the Supreme Court set out in Strickland v. Washington, 466 U.S. 668, 689, 104 S.Ct. 2052, 2065, 80 L.Ed.2d 674 (1984), to determine whether a criminal defendant’s conviction must be set aside because he received constitutionally ineffective assistance of counsel. See United States v. Aguon, 851 F.2d 1158, 1172 (9th Cir.1988). First, the defendant must show that counsel’s performance was out of the wide range of reasonable professional assistance. Strickland, 466 U.S. at 690, 104 S.Ct. at 2066; Evans v. Lewis, 855 F.2d 631, 636 (9th Cir.1988). Second, the defendant must show that the attorney’s deficient performance prejudiced the defense. Strickland, 466 U.S. at 694, 104 S.Ct. at 2068; United States v. Schaflander, 743 F.2d 714, 717-18 (9th Cir.1984), cert. denied, 470 U.S. 1058, 105 S.Ct. 1772, 84 L.Ed.2d 832 (1985).
A
A mental state defense may have been a plausible defense for Burrows. Evidence that Burrows had ceased taking the psychotropic drugs, suffered a relapse of his paranoid schizophrenia, became withdrawn, suffered from memory loss and severe mood swings and could not carry on a