Silver Spring man pleads guilty in child porn case A Silver Spring has pleaded guilty to charges of distributing child pornography, admitting that he possessed nearly 900,000 explicit images and videos.

Gary Callis, 42, pleaded guilty in federal court in Greenbelt. Court records say that when agents searched his computer in February 2010, they found 866,000 images and 8,100 films that depicted the sexual abuse of children.