2-Year-Old Fatally Shoots Mother

According to ABC NEWS the father of the toddler left the Glock 9mm on the table unattended. The gun which weighs three pounds when loaded and takes 4.5 to 5.5 pounds of pressure to pull the trigger.  Could the two year old have pulled the trigger?  Most assume you could just dust the kid for residue but there are mitigating factors.  What do you think?  Watch the ABC Video report below for more.