Warning: This story contains graphic descriptions of child violence that may be disturbing. Edgar Salvador Casian-Garcia, 34, and his girlfriend, Araceli Medina, 38, were taken into custody last week by Mexican officials, the Marshals Service said, after being charged in Franklin County, Washington, with aggravated murder, four counts of child rape, and child assault. A reward of up to $25,000 had previously been announced by the agency for information leading to their arrest