Well I wrote a murder story when I was 9 years old during creative writing at school. It took place at school and all my friends were clamouring to be a character in it and the murderer character was an axe murderer so the story got a bit gory. The teacher was fully aware of it and didn't discourage me at all. In the story, we (my friends and I) were all trying to catch the murderer - a la Enid Blyton. In fact, the story got even gorier because there were so many suggestions from the other kids about additional details to put in.

I can assure you I am perfectly sane and have no psychopathic tendencies, I not have been abused in any way, nor was I permitted to watch or read inappropriate material.

Kids can be gruesome little things at times. Fairytales can be quite horrific too (eating up the 3 little pigs, the witch wanting to eat Hansel and Gretel) when you think about it...but they are all about giving them that delightful chill while still feeling quite safe.

I'd be interested to find out the context, remembering that kids generally don't have the same scope of understanding about murder as an adult does.