Defense lawyers also attacked the government's assertion that Manning started sending classified information to WikiLeaks within weeks of starting work as an intelligence analyst in Iraq in 2009.
Army computer crimes investigator Mark Johnson testified on cross-examination he found no evidence on Manning's personal computer of WikiLeaks' "Most Wanted Leaks of 2009." The government alleges Manning used the list as a guide to obtain documents and videos for the anti-secrecy website.
Johnson also testified on cross-examination that he found no evidence that WikiLeaks founder Julian Assange asked Manning for anything specific in a series of online chats and email exchanges.
Manning's court-martial is moving along faster than expected. Col. Michelle Roberts, a spokeswoman for the Military District of Washington, said the court-martial was a week or two ahead of the government's projected schedule. The trial began last week. It was originally projected to run through August or September.
She said the pace is partly due to agreements between prosecution and defense attorneys to accept written statements from witnesses instead of having them testify in court.
The trial will resume Monday.