I haven't touched on the death penalty in quite some time. There is  something I want to get out into the open before anything else. Many  people who are secular minded oppose capital punishment for various  reasons. That, however, doesn't mean we are doormats or easily  intimidated. I'll just say it: I'm opposed to a government having the  power to kill it's own citizens. That being said there are a few  occasions where I see no problem with justifiable homicide. One very  clear line in the sand on my beach is entering my home uninvited.  Assuming they get past my two mastiffs, one of which is 225 pounds, and  assuming they don't get the drop on me there are a couple of possible  outcomes for the intruder. Both of these would likely be the last thing  they see.

Or
(For the curious: Colt AR-15, .45 AMT Longslide) Now for a word or two about gun ownership:
I grew up around firearms and know how to use them. If you even
 think you'll shoot at a shadow in a self defense situation, then 
just don't even get one. Not until you take proper training courses or have an experienced marksman show you how to shoot...
and when not to.  The last thing you want to do is panic and shoot at a shadow only to  find out it was your teenage child sneaking back into the house or the  simple minded fellow from down the street who mistook your house for his  own. I keep a handgun where I can access it in a hurry. The clip for it  is nearby and also accessible in a hurry. I can have it loaded with a  round chambered in under 8 seconds. Both are hidden and if the nephews  are over it goes in the gun safe until they are gone. No guarantees I'll  survive a home invasion or the like, but I'll take whatever reasonable  odds I can get. Also, for fucks sake, never leave a loaded gun laying  around in a night stand or anywhere else. Its true that you can  effectively render the chance of an accidental discharge to near zero.  However if someone chances onto your handgun while snooping the last  thing you want is for them to turn your own loaded gun on you. Everyone  has their own views on that kind of thing though, I prefer being as safe  as I can. Now, if you aren't 
sure that  you could pull that trigger and drop someone then simply don't use it.  Again, things aren't going your way if you hesitate and some asshat  takes your own gun from you because you hesitated to pull the trigger.  No knee capping, either. Unload the whole clip into the son of a  bitch(it's not like in the movies where one shot sends them bouncing all  over from wall to wall and then dying instantly). As far as I am  concerned the second someone breaks into another's home they forfeit  their life on the spot. Thing is I will not shoot someone who is running  away, nor will I after it is clear the danger has been abated. There is  a time for lethal force and it must never be treated lightly. So if  I have no problem with going Scarface on intruders and afterwards having  a sandwich while I wait for the authorities to arrive, why am I so  opposed to the death penalty?
This is where all of the yay-hoos who get hard at the thought of  mixing projectile weaponry and Pabst Blue Ribbon lose their hardons for  me.
1) I have no problem with lethal force being used to defend oneself  or others when being subjected to a violent crime. Use of excessive  force and torture are wrong, but if the safest and fasted way is to  waste the criminal then so be it.
2) Like I said earlier I have an ethical issue with a government  being able to kill it's own citizens. I just do. Police action and such  are obviously not what I am talking about here. I am talking about  executions.
3) The reason I frown on executing people is the same reason I frown  on shooting someone in the back when they are running away. Taking a  life is serious. The ripple effects on the lives of those involved are  nothing to balk at. If the danger is no longer present then killing  someone is murder.
4) Killing after the fact is murder. Vengeance is murder. If we are  going to live in a society of laws where life is respected then that  needs to stop.
5) There is no practical reason for the death penalty. Our justice  system by it's very nature is not set up for it(which is a good thing).  It doesn't clear jail cells nor does it save tax dollars. Neither of  those are good enough reasons to kill someone, anyway, if you ask me. If  we want to clear jail cells then there are mountains of ludicrous  politically motivated and counterproductive laws which actually create  criminals which could be abolished.
6) One innocent person executed is too many. We've gone way beyond  that and what is even more terrifying is that there are quite a few  politicians who have no issues with this...nor do their supporters "It  takes balls to kill and innocent man!". Unfortunately it takes no brains  to vote, either.
7) The numbers indicate that the death penalty is no deterrent to  crime. We need to join the rest of the first world and put and end to  it.
Before anyone chimes in with a story about how I'd "change my mind  if..." then adds some story about broken glass, a weed whacker, and an  infant you need to know a couple of things. My family has had it's share  of crimes committed against us, a couple of them would have easily  justified killing the perps at the time of the crimes had that been  possible. So save it. No matter how I feel emotionally my ethical code  still states that killing after the fact is wrong. The whole point is to  keep emotions in check when considering things like law and order, not  give in to them and behave like methed-out soccer moms who watch FOX  news 24 hours a day. If eye for an eye is what you require to feel  better then about the only thing I can recommend to you is to move to  some war torn African nation or somewhere in the theocratic middle east.  Then you really WILL know the meaning of 
"Just because you haven't done anything wrong doesn't mean you have nothing to worry about."