The remains of Karol Ann Keasler, 42, of Brooklyn Heights, were finally identified Friday, the New York Daily News reported.
"It's been almost 11 years," said Keasler's younger sister Susan. "And after all this time, I had come to believe that things like this only happen on [the CBS show] 'CSI.'"
Keasler worked as an event planner for investment bank Keefe, Bruyette & Woods on the 89th floor of the south tower of the World Trade Center.
She was identified using new technology that can extract a full DNA profile from a small bone fragment.
"I didn't even realize they were still trying to identify her until the Nevada police came to my mother's door and told us what they had found in New York," Susan Keasler said.
"I feel a little bit restful, a little bit relieved, a little bit thankful," she said.
Of the 2,753 people killed during the terror attack on the World Trade Center, the remains of 1,633 have now been identified. Another 1,120 people were either not recovered or have not yet been identified, the newspaper said.