The investigator saw a ready finger on the trigger.
By using infrared light, investigators can see underdrawing done in carbon.
The investigators actually saw six of them during their observations.
Many investigators still see a powerful logic in the teenagers' confessions.
A good investigator can see that much in a split second.
He said undercover investigators went into the oil fields and saw theft taking place.
And the investigators saw extensive brain cell death, which also is typical of Alzheimer's disease.
But the investigator did see that free left hand as it encountered the switch.
It's unclear how much of the true story will ever be known, as important documents were shredded before investigators could see them.
On one wall a year ago investigators saw a sign reading: "Don't talk.
