Dad on trial for killing bystander who tried to save dad's kids after crash (Arlington, Texas)

Dad is identified as THOMAS HARPER. No mention of where the mother was.

http://www.myfoxdfw.com/story/25384428/arguments-begin-in-trial-of-arlington-dad-accused-of-murdering-good-samaritan

Arguments begin in trial of Arlington dad accused of murdering good Samaritan

Posted: Apr 29, 2014 8:11 PM EDT Updated: Apr 29, 2014 8:15 PM EDT By: myfoxdfw.com Staff

An Arlington father is on trial for murder after allegedly smashing his SUV into several vehicles at a busy intersection with his children in the backseat, and shooting and killing a good Samaritan who rushed to help those children.

Thomas Harper is also charged with intoxication manslaughter and child endangerment following the Dec. 2011 incident.

Arguments began in court on Tuesday, with the defense saying that Harper was disoriented and that he shot the good Samaritan, 18-year-old Clarence Robinson, while defending his family.

The district attorney argues that Harper was driving erratically, was high at the time and put his kids in danger.

Another driver, Najee Nasir, was killed in the crash allegedly caused by Harper.