Gilgo Beach killer pleads guilty

In a dramatic courtroom appearance, Rex Heuermann changed his plea to guilty, ending a legal process that has captivated the nation.

As part of his agreement, Heuermann will cooperate with FBI behavioral analysts, potentially providing insights into other unsolved cases.

The victims' families expressed relief at the admission, which spares them from a lengthy and painful trial.

Heuermann's secret life as a suburban professional while carrying out the killings has made this one of the most notorious serial murder cases in modern American history.