William Moore was a Sergeant stationed at Quantico and who made various appearances during Seasons 1 and 2 of NCIS. At some point, he, his wife Judy and best friend, Roger Caine went on a camping trip but while Moore was off filming the sunrise, he was attacked by David Runion who killed him by striking him in the head with a baseball bat before throwing Moore's body down a cliff. The discovery of Moore's remains by some Park Rangers prompted them to call to NCIS who arrived on scene to investigate the crime.