Exclusive: George Stephanopoulos Interviews Officer Wilson

In an exclusive interview with ABC News' George Stephanopoulos, police officer Darren Wilson breaks his silence about the shooting of Michael Brown.

Wilson told ABC News that he did not execute Brown on August 9 but was in fear for his life and was just doing his job.

Wilson told ABC News that Brown reached into his car and grabbed his gun. He described how Brown charged toward him and he felt that he had to shoot Michael Brown.

The interview comes a day after the grand jury's decision not to indict Wilson in an incident that sparked national outcry.

Wilson did say that he was sorry for the loss of life but he would not do anything different that day. He says he has a clean conscience over his actions that day.

Tune into World News Tonight at 6:30 p.m. EST to see Wilson's first public remarks about the fatal shooting.