Simple past tense and past participle of testify.(verb)
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Use "testified" in a sentence
"Sarah Palin testified that she did not realize anyone had hacked her Yahoo e-mail account during the 2008 presidential campaign until it was reported in the news media, CNN affiliate WATE reported Friday."
"Among other things, Paul Cantarella, who has never testified, is charged with kidnappings and home invasions."
"Hussain testified during 13 days on the witness stand that he met Cromitie in 2008 after being sent by the FBI to infiltrate a Newburgh mosque."