Chandra Levy, Congressman Condit's secretary, missed one year ago. After she missed, the police classified her case as "missing". This year, her skull was found in a park. Then, her case was updated to "homicide" at her parents' request. Even somebody is belived to have died, the police cannot establish a homicide case before the body is found. In one word, "homicide" is used to clasify the cases.

So, what is a murder? A murder is the name of a crime. A person may be charged with murder. Of course, nobody can be acused of murdering others unless a relevant homicide case has been established.