When the NTSB concludes the on-site phase of its investigation, Metro-North will begin to remove the damaged rail cars and remaining debris.

WSJ: Probe into Conn. train crash giving way to cleanup

Those who come forward can limit their engagement with the inquiry to just the forum, or decide to progress and give evidence to the inquiry's lawyers in the public phase of the investigation.

BBC: Sir Anthony Hart

The Vatican said the first phase of its preliminary investigation, under chief prosecutor Nicola Picardi, has ended.

CNN: No cardinal suspected of pope papers leak, Vatican insists

Now into its final phase, the pre-trial investigation into the sinking will determine whether they should be put on trial.

BBC: Costa Concordia: 'Hand of God' saved lives

The 35-year-old Mr. Freeman turned against his buddy, wearing a wire for the government during a crucial phase in a sprawling, three-year investigation that authorities say could eclipse in scope any previous insider-trading case.

WSJ: They Were Best of Friends, Until the Feds Showed Up