Please help if you can

Hello my name is Kimola (picture on the left). I'm raising money because my little brother (who's picture is on the right with my mom) was murdered Friday, March 10, 2017 in Jamaica and I'm really scared for their lives and trying to get my mom and little sister out of the dangerous area that they live in. I moved from Jamaica to the United States because my dad brought his children out here years ago because of how dangerous the area is. However, him and my mom weren't together, and when he left, he left her and the children she didn't have with him in Jamaica (my little brother and sister). Now, it's only my mom and little sister. The Immigrant Visa Application Processing Fee is $535 to first get my mom into the United States and after, get my little sister here. Anything would be greatly appreciated, even a dollar. My goal is to get my mother and little sister out here in Georgia with me as quickly as possible, please help if you can, and thank you so much for your time.