Well I know that seeing someone die and also Killing someone can give you a image that could stay in your mind forever. It might help if you think Why you did this and what good it brought to you and...
Well I don't know how to help you on that, But I Strongly suggest you see a doctor about seeing people who are dedicated to help you overcome this haunting.
Here are some signs
1. little or no eye contact
2. he does not respond to his name at 12 months old
3. does not babble or coo by 12 months
4.does not gesture or point by 12 months
5.does not say...