If that poster wanted to find it she could have. I Googled Palestinian man murdered Belgium, up a news story popped from a website I didn't recognise. I read the article then adjusted my search to include where in Belgium the man was found according to that article and there you go Belgian newspapers, it took me less than 2 minutes.
It doesn't seem to have been reported in any 'mainstream' English language news and I won't say my thoughts on that but it wasn't difficult to see that a story from 5 years ago wasn't what people were talking about.