The month after Jexier's May 2005 death, she was back at work, as a supervisor in a Connecticut nursing home.
In an e-mail response to questions, a Connecticut health department spokesman blamed Wilson for hiding her past, and said communication among states has improved.
Christopher T. Godialis, who prosecuted Wilson for the Connecticut chief state attorney's office, said a system that relies chiefly on the honesty of such nurses does so at its peril.
"The way the situation is set up now, there's no way for Connecticut to have known about what happened in Florida unless Orphia had told them," he said. "The state didn't check anything."
Ornstein and Weber are senior reporters at ProPublica. Moore is a Times researcher.
Lisa Schwartz, ProPublica's director of research, contributed to this report.