Coombs said Manning told Adrian Lamo, a former computer hacker who tipped federal authorities to Manning's activities and testified for the prosecution, that he believed the leaks would "disclose true casualty figures in Iraq" and it was "important that the information got out."
Coombs also pointed to a photo that was shown several times in court on Thursday. Prosecutors depicted a smiling Manning in a cross-dressing image as proof he was proud of the crimes he is accused of committing.
But Coombs said Manning, who is gay, was happy because the picture showed a situation in which Manning could "be himself."
Manning has attracted a number of supporters who claim he is a whistle blower.
On Friday, Lind barred a member of the media for allegedly posting threatening messages regarding some court-martial participants. Details were sealed.
Earlier in the day, military officials removed the man's belongings from the media center. He was wearing a "Support Bradley Manning" shirt when he arrived at court.