DFHack has a kill under cursor command as i believe anyway:) bt wfor those cheaty bastarts like me using scripts from vjek (thanks a lot for them btw) - maximum stats are a little bit over 34500 - if you put more it will go to negative value (btw Runesmith managed to give me 60000 for some reason in 31.25 times).
why have a kill command when you can convert them.
Have a huge wild creature in the area just use some script to tame and enlist them to the military.
Well first of all a script to save for that kind of thing would be good if you have any:) And second - kill is for KILL:) Then you want it dead and butchered:)