The best arguement FOR laser sights is that they allow you to put the bullets into the bad guy with less likelyhood of missing and hitting an innocent bystander. As many experienced and practiced legal minds have pointed out, if lethal force was justified then it doesn't matter what you use to administer it. If this argument regarding lasers were true, it would mean you could be indicted for the gun you used, the ammo you used, the fact you carried, that you were in that particular place and time, ad infinitum. Make sure any use of force is indeed necessary and have your attorney present before any statements are made and this is pretty much a non-issue. If any of the preceding aren't followed, the use of a laser is merely a sidebar and you have other, more important things to worry about.