Point 3: worldwide use of the death penalty
You can add the issue of "religion" to this part as a subsection. Capital punishment is a part of Islamic rules and in many Islamic countries, such as Iran, and Saudi Arabia, it is executed.
I read an article, entitled "Attempting Suicide by Homicide", which showed how capital punishment is transformed into a tool for committing suicide. This article is really interesting and I think it would help you.
Just one more thing, you can write about the victims' family and their attitudes toward this type of punishment.