I did see an .MPEG video not too long ago of a French TV news reporter in the Gaza Strip that was covering a rock-throwing spat between Palestinian kids and the IDF. During his broadcast, a jeep rolled up 50 yards away from his position. An Israeli soldier got out, aimed in deliberately on the French reporter (who was wearing a ceramic/kevlar composite body armor rig) and shot him dead-center in the back plate with his Galil 5.56.
The rest of the video was footage of the French reporter writhing on the ground from the sting that bullet put on his back. It must have felt like a belly-flop into a pool from a 40' diving board, but the ceramic plate saved his life.
That video shows a deliberate shot on a journalist, but it's up to you to judge whether it was 'systematic' or not.
I even think there was a link here on FR about it once.