Espiritu v. Derwinski — Lay witnesses are not competent to diagnose cause of death

The appellant sought DIC based on the veteran’s death from septicemia and buttock abscesses, arguing that service-connected shrapnel wounds caused or contributed to death. Her claim had previously been denied by the Board, so reopening required new and material evidence under 38 U.S.C. § 5108. The Court reviewed several submissions, including duplicative death-certificate evidence, medical and lay statements, and affidavits from neighbors.

The Court held that the duplicate death certificate was not new, and that some items were either irrelevant or actually adverse to the claim. Most importantly, it concluded that the lay neighbors’ statements purporting to identify the cause of death were not competent medical evidence because diagnosing the cause of death requires specialized knowledge. The Court explained that lay persons may report observable symptoms, but cannot provide probative medical diagnoses on etiology in this context. Because the appellant did not submit evidence that was both new and material, the Board’s incorrect analysis of that standard was harmless, and summary affirmance was granted.

Lay evidence is competent to describe observable symptoms, but not to supply a medical diagnosis or etiological opinion on matters requiring specialized medical knowledge; such statements are not material for reopening when the issue is medical causation.

Do not rely on lay affidavits alone to establish medical causation or cause of death. If the disputed issue is etiology, reopening generally requires competent medical evidence.

Espiritu remains an important foundational case for competency analysis in veterans law. It is frequently cited to challenge lay opinions that cross the line from observation into medical diagnosis, especially in reopening, nexus, and cause-of-death cases.

Improper Rejection of Lay Evidence [Evidentiary Errors]

A surviving spouse submits statements from family members saying the veteran’s service-connected condition caused his death, but no doctor’s opinion supports the theory. Under Espiritu, those lay statements may describe what relatives observed, but they are not competent evidence of medical causation.

Use Espiritu defensively when VA credits non-expert causation statements as if they were medical opinions, and offensively when opposing reopening or nexus theories supported only by lay diagnosis rather than competent medical evidence.

Manio v. Derwinski, Colvin v. Derwinski, Godwin v. Derwinski, Caldwell v. Derwinski