From the above link posted by BlueTrin:
Reported BY LAIST STAFFIN NEWSON SEPTEMBER 3, 2019 4:14 PM
“Homendy (NTSB Board Member Jennifer Homendy) said she was 100 percent confident that investigators will determine the cause of the fire, why it occurred, how it occurred, and what it will take to prevent it from happening again.”
This is dangerous thinking in the first days of the NTSB investigation. I hope that it is an error in reporting rather than an actual statement from the NTSB leadership. Any credible investigator, regardless of the length and cost of an investigation, must always be willing to say “I don’t know.” This particular investigation is hampered by well-burned evidence, well-washed by salt water, and thirty-four of thirty-nine on-board eyewitnesses who will never give testimony. The only thing that can be said with 100% confidence is that at the end of the investigation, a measure of uncertainty will remain.
NTSB Investigator-In-Charge Adam Tucker should distance himself from such remarks if accurately reported.
I agree that a "We are determined to find the cause..." type wording would be better but I am willing to overlook it considering the horrific loss of life. I suspect that the accident site has been completely searched to find all evidence that may help with the investigation.