a grand jury declined to indict two officers involved in the shootding. here's how tim mcginnty justified the shooting. >> by close examination, especially of what is perhaps the most critical piece of evidence, a very recent enhancement of the surveillance video by an expert laboratory often relied upon by the nib fb it's indisputable that tamir was drawing the gun toward them as the officer exited his car. believing he was going to be shot was a mistaken, yet reasonable belief in his police training. he had reason to fear for his life. it would be unresponsible and unreasonable if the law required a police officer to wait and see if the gun was real. >> joining us now a former state and federal prosecutor and currently a professor of law at