NBC and CBS were forced to retract initial reports about the identity of the shooter responsible for the deaths and injuries at the Navy Yard in Washington on Monday.
Both networks identified the same man as the shooter, and then had to walk those reports back:
NBC's Pete Williams said the error came from sources who found an ID card that looked like the suspected gunman:
The false reports were perhaps the most prominent errors in a day filled with confusing and contradictory information.
The shooter was later identified as Aaron Alexis, a 34-year-old from Fort Worth, Texas.