I watched a good series about inmates on death row in Arkansas, America and it debates the use of Midazolam (the drug they inject to kill the person) which is seen as many as immoral due to tons of complications and lower than expected efficiency. They basically decided to execute seven inmates in 11 days after more than a decades of no executions because the batch of lethal injection was set to go out of date. It was a really interesting insight and shows both sides speaking to the lawyers, families of victims of the crime and the inmates. I think it might have been life and death row on BBC iPlayer, could have some useful points for you