Okay, I know this may sound grim to some, but after all, it is their nature.
I saw one ghost shrimp not doing well for some unknown reason. It was laying on its side and kicking but not reacting much to external stimuli.
I grabbed the new camera to get a better view from a macro shot and after I did this, another ghost shrimp approach and started to eat the dying one. I decided to document this event on video.