The Tenth Circuit has determined that a California conviction for possession of child pornography does not match the federal definition of a crime involving child pornography because “the statute covers nonexplicit images of children with no focus on the child’s intimate areas—for example, an image that depicts an adult simply hugging a fully clothed child where the adult had the intent to be aroused.”
The full text of United States v. Griffin can be found here: https://www.ca10.uscourts.gov/sites/ca10/files/opinions/010111367340.pdf