My aunt, my uncle and my family

About a year ago, my aunt was shot and killed by her husband. My aunt was my mom's sister and live fairly close and since I was little I spent plenty of great times with her. My aunt and I were very close. My uncle shot my aunt in the neck and panicked and attempted to flee the country. My uncle did NOTHING to help aid my aunt, he did not touch her or even move her, as found out in the court case. Also, my uncle was in the house for at least an hour after he killed my aunt. Later on, my family learned if he had called 911 my aunt could have survived. This fact alone tears me apart everyday.
clearly, the state pressed charges however my family did not. My grandparents (the parents of my aunt) believed my uncle did not mean to kill her and that it in fact was an accidental shot. Half of my family supported my uncle, while the other half supported my aunt and believed it was at bare minimum negligence. During the court case, most of my family sat behind my uncle and my parents sat behind the State. after being shown pictures of their dead daughter, my mom would be very visibly upset and my grandpa would comfort the man who killed my aunt instead of his own daughter. This entire case is tearing my family apart and I am rarely able to see my family because of these events.
The day the verdict was going to be announced, my uncle committed suicide by taping himself to a lawn chair and drowning himself in the pool.
It has been a little over a year and being a 16 year old I have few major life experiences. Not that I haven't had my fair share but I still feel I am unable to process everything and my aunt's death seems unreal.