Testimony

DEF: spoken or written statements that something is true, especially those given in a law court.

EX: The testimony of the last witness in the case was key to the conviction of the accused.

Merriam-Webster Online Dictionary
testimony (noun)
1.
a) (1) the tablets inscribed with the Mosaic law
(2) the ark containing the tablets
b) a divine decree attested in the Scriptures
2.
a) firsthand authentication of a fact - evidence
b) an outward sign
c) a solemn declaration usually made orally by a witness under oath in response to interrogation by a lawyer or authorized public official
3.
a) an open acknowledgment
b) a public profession of religious experience