How can there even be any doubt that they deserve the death penalty. Notice how the felon is one of the guys with a gun?
From the FoxNews story:

The most notorious of the crimes was on Dec. 14-15, when the two men entered a Wichita home. The two women and three men inside were forced to engage in sexual acts with each other and to withdraw money from ATMs. The women were repeatedly raped before the five friends were taken to the soccer field, forced to kneel in the snow and were shot in the back of the head.