Prosecutors have formally charged a victim of last week's Arizona shooting rampage with threatening a Tucson leader of the Tea Party political movement during the taping of an ABC News town hall-style television program. James Eric Fuller, 63, who was taking part in the televised forum, was involuntarily committed for psychiatric evaluation on Saturday after he grew agitated, stood up to snap a picture of Tucson Tea Party founder Trent Humphries and shouted, "You're dead," police said.