It could prove to be critical evidence if a suspect is charged.

Henderson claims to have critical evidence about the rogue craft but is killed before he can elaborate.

Such apparently damning statements have made the reserve records critical evidence in the Government investigation.

There were no defense attorneys expert, so far as he knew, in explaining the disappearance of critical evidence.

"They must have critical evidence that something bad was about to happen and they needed to stop this guy."

He had the critical evidence to challenge the diagnosing doctors.

One theory could be that the report introduces critical new evidence.

"It's our duty to gather every bit of critical evidence, not to leave anything out," the prosecutor said.