The case is the first courtroom test of a special counsel appointed three years ago to search for misconduct during the investigation into potential ties between Russia and Trump's 2016 campaign.
The FBI — which was already investigating potential collusion between the Trump campaign and Russia — examined the data but quickly determined that there was no suspicious computer contact.
Prosecutors alleged Mr Sussmann was actually acting on behalf of the Clinton campaign and another client, a technology executive, and that he hid that information to make the data seem more credible and to boost the chances of getting the FBI to investigate. Lawyers for Mr Sussmann denied to jurors that he lied, saying it was impossible to know with certainty what he told Mr Baker since they were the only participants in the meeting and neither of them took notes.
They elicited testimony from former campaign officials, who said Mr Sussmann had not been authorised to visit the FBI.