but i can tell you, there are two male victims and one male victim. all of the deceased victims are black. the shooter had authored manifestos went to his parents, one to the media, want to federal agents. portions of the manifestos details the shooter's disgusting ideology of hate. finally put, the shooting was racially motivated and he hated black people. >> nbc national correspondent is tracking developments in west palm beach. marissa, bring us up to date what we know at this hour? >> yes, a lot of it you heard now authorities were largely tightlipped until the last half hour, alicia, what we learned from the press conference was frankly disturbing and illuminating. we know there are four dead total including the gunman who the sheriff's office in jacksonville said he turned the gun on himself. the manifesto is such a key part of this because they say that this was rooted in white