I totally agree with the owner being at fault. If you are going to own a dog whether it is a large breed or smaller one the animal should never be let alone to run free without some type of confinement ie. fence, chain etc. It really doesnt matter whether the jogger was running in front of or behind the animal the jogger instilled some type of fear or defense in this dog to just attack him like that.
I dont believe in putting a dog down for this type of attack, but I am split 50/50 on if an animal mauls or kills someone then there may not be any other choice. As most pit owners know (including myself) once a pit bull has tasted blood and has been in an agressive attack that there is a high probability that it will happen again.
To make a long story short, please if you want to purchase a dog whether large or small, make sure that you are first able to house the animal, have an area where the animal can run without the possibility of harming anyone and you have the time to spend. All to often animals are bought for the wrong reasons and end up in the pound, local shelter or put to death!!!!!!!!!!