Recenty, via Vanderbilt University research news site, some news about neuroscientifical approach to the third part punishment issue was published. As we can read:
In a paper published online on April 15 by the journal Nature Neuroscience, a pair of neuroscientists from Vanderbilt and Harvard universities has proposed the first neurobiological model for third-party punishment. It outlines a collection of potential cognitive and brain processes that evolutionary pressures could have re-purposed to make this behavior possible.
The whole news along with the link to the paper is here.