A deputy commissioner in former Mayor Rudolph Giuliani's office, Bradford Billet of East Hampton helped oversee a program to locate people who had been injured, killed, or had gone missing after the Sept. 11, 2001, terrorist attacks in Manhattan. "At one point we had a list of over 20,000 missing people that we had to pare down," he said. "We had a solemn obligation to give the families closure."

On the night of the deadly accident, just after sunset, Lisa Rooney left a bar and was driving home in her Chevrolet pickup truck on Flamingo Road in Montauk when she swerved and struck John James Usma-Quintero. Following a guilty plea in March, Ms. Rooney was sentenced on Thursday to jail time for her actions.