There are more than 2000 inmates on death row in 2017 in the United States, but no one knows how they will die.

All states with the death penalty use lethal injection as their primary method of executing inmates, but just what will be injected varies from state to state and execution to execution. States are scrambling to come up with new combinations of lethal drugs because suppliers are refusing to sell them drugs for lethal injections, or they’re looking to other methods of execution: Utah brought back the firing squad.

Each execution with a new lethal injection cocktail is an experiment, and many of these experiments have already gone wrong. Some states won’t say where the drugs they’re using for lethal injections are coming from, and some have admitted that they’re from compounding pharmacies, which do not have to go through the same regulation process as other drug manufacturers.

(Includes executions in the United States from 1890 to 2010. A “botched” execution is one that went wrong in any way. Data from the Death Penalty Information Center.)

This project aims to uncover how each state decides to execute its inmates, where the drugs used in lethal injections are coming from and what the last minutes of an inmate’s life are like.

Image via Wikimedia Commons