Publicity and the Post Office

I don't understand why workplace shootings a Post Offices get more attention than do other workplace shootings. At least as far as I know, workplace shootings in non-governmental facilities do not receive the same nation-wide coverage. One of my neighbors was killed in a workplace shooting in 2002, and I do not know of any national news organizations which picked up on the story. Either this is because news in LA gets more attention than news in Indiana, shootings of government workers or on government grounds get more coverage than shootings (of and by management) at a factory, or it is simply ridiculous.