Why do only some murder cases get national attention when murders happen ever day?
Simply watch the news stories about murders that get national attention and you will figure out which ones tend to get the most attention. Those involving children make the list, especially if the murder itself is particularly gruesome. Those involving children of rich people seem to make the list quite often, especially if the parents have enough money to buy their own air time. Murders involving well known people always get major attention, as do those committed by well known people. And, of course, if the murder victim happens to be white, female, good looking, under the age of 30, and from a well-to-do family there is a very good chance it will get some level of national attention.