I would be happy to help assist you in understanding your dream.
This man that is in your dream Is symbolic or a representation of something in your life that is causing harm to you and your family. Whether it be a real person , or a situation you are in. 911 is showing you are seeking help and it is also symbolic #9 is making better judgments. Bathroom is a place of cleansing things from your life. Being a hostage is showing something that has kept you bound. Something or someone has kept you from making your own choices. Fearing for your children and your life and protecting is showing how you have kept your children safe from the outcome of what this man is representing. Since you killed him in the end of the dream, is a good thing. This situation is being put to rest. The unknown children can be representing parts of you, parts of your life or other responsibilities you are taking care of. If you have anymore questions please feel free to ask.