The Los Angeles artist says in a statement that he actively tried to conceal which photo he worked from in creating his Hope poster of Barack Obama. It was an Associated Press photo, as the news wire has argued in legal proceedings.

Throughout the case, there has been a question as to which Mannie Garcia photo I used as a reference to design the HOPE image. The AP claimed it was one photo, and I claimed it was another....

The AP is correct about which photo I used...While I initially believed that the photo I referenced was a different one, I discovered early on in the case that I was wrong. In an attempt to conceal my mistake I submitted false images and deleted other images. I sincerely apologize for my lapse in judgment, and I take full responsibility for my actions, which were mine alone.

The AP said in its own statement that it's not satisfied:

Fairey’s lies about which photo was the source image were discovered after the AP had spent months asking Fairey's counsel for documents regarding the creation of the posters, including copies of any source images that Fairey used. Fairey's counsel has now admitted that Fairey tried to destroy documents that would have revealed which image he actually used. Fairey's counsel has also admitted that he created fake documents as part of his effort to conceal which photo was the source image, including hard copy printouts of an altered version of the Clooney Photo and fake stencil patterns of the Hope and Progress posters. Most recently, on Oct. 15, Fairey’s counsel informed the AP that they intended to seek the Court’s permission to withdraw as counsel for Fairey and his related entities.

The AP intends to vigorously pursue its countersuit alleging that Fairey willfully infringed the AP's copyright in the close-up photo of then-Sen. Obama by using it without permission to create the Hope and Progress posters and related products, including T-shirts and sweatshirts that have led to substantial revenue.

AP's background page.