NEW : All-clear given shortly after 9 p.m . The man who was shot in the head and killed by police is a former Marine from New York City, authorities said. The Secret Service identifies the suspect as a homeless man . Part of the incident is broadcast live on CNN 's `` John King USA '' program .
NEW : All-clear given shortly after 9 p.m . The suspect will be charged with unlawful entry and contempt of court . The Secret Service identifies the suspect as a homeless man . Part of the incident is broadcast live on CNN 's `` John King USA '' program .