It is a subconscious fear. Hug your daughter the next time you see her.
I had a dream where one of my online friends, Avi, is sent to get hanged. As if that will happen.
What ever it means is probably nothing to do with your daughter being murdered.
It may mean that you feel you have somehow placed her needlessly in danger, allowing her to play sports, get too near the stove, etc...
Or you could simply have projected something you saw on television into your subconscious about another child who was murdered.
It. may mean,just that you love your daughter dearly,and fear the things one sees daily on TV and the newspapers
It's your worst fear in your subconscience
Just your inner self worrying about losing her! Just a dream, don't stress! :)