A Bureau of Criminal Identification agent testified that some of Anderson's computer files had mostly child or adult pornography photos.
The files also contained movies, featuring victims who took the stand last week.
Agent Jim Swanger also compared Anderson's files to those of another suspect in the case, Robert Sandford.
“User 'R Sandford' set up this very elaborate Web page, to view child pornography," Swanger said. "He also used it to view child pornography. I believe he used it for himself."
Swanger testified Anderson, on the other hand, was more careful. “That way," he says, "nothing was on the PC, other than the links to it."
Sandford, who originally was indicted along with Anderson, died last spring.
Anderson is accused of hundreds of charges, including Internet child pornography and prostitution.