ex·cul·pate /'ek-skəl-ˌpāt, ek-'skəl-/ vt -pat·ed, -pat·ing [Medieval Latin exculpare, from Latin ex- out of + culpa blame]: to clear from alleged fault or guilt
a statement...offered to exculpate the accused is not admissible unless corroborating circumstances clearly indicate the trustworthiness of the statement — Federal Rules of Evidence Rule 804(b)(3) compare acquit, exonerate
ex·cul·pa·tion /ˌek-skəl-'pā-shən/ n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.