Robert Bales. Mohammed Merah. George Zimmerman.

What do they all have in common? They all murdered innocent children.

Robert Bales is a US soldier accused of murdering 16 Afghans including several young children.  Experts are weighing in on the news outlets across America discussing his brain injuries, PTSD, stress at home and other reasons why he would commit such a horrendous crime. They also claim alcohol was involved and his lawyers says there is no evidence of his crimes.