I'm so sorry to hear about your friend, that must have been hard. Losing someone you love is never easy but when you know there could have been hope as the surgery would have been given her a chance and the greedy uncle basically took that chance from her, it's even harder. I could not forgive the uncle, I don't think I could.
I was always wondering how can artists come up with ideas and put them on paper or canvas so that the viewer can understand what they mean.
Your drawing is amazing, it's so real, you did a very good job with it. It's detailed and the dark background draws the attention exactly where it is needed. Congratulations for the great job!