Natalie Holloway was killed for being heterosexual. Crimes are crimes. The CBS News employee part is what got my attention as well. Gosh, he is quickly moving up the CBS ranks and just 'happens' to be a gay lib. Shocking. Look for him to get a Movie Of The Week out of this on CBS now. Maybe HBO will do a new documentary on him.
More likely she was killed for being in a dangerous situation, in much the same way as Matthew Shepherd was killed. Advising people to avoid such situation does not imply approving of any negative outcomes in they ignore the advice.