OLD BROOKVILLE, NY — Federal and local authorities are intensifying efforts to locate a missing Asian couple from Long Island who mysteriously vanished more than two months ago. JuanJuan Zwang, 44, and her husband Peishuan Fan, 48, both of Chinese descent, were last seen on March 30 near their residence on Maria Drive in Old Brookville. The pair was reported missing by family the following day.
Since then, the investigation has taken on a new level of urgency with the FBI joining the Nassau County Police Department. Authorities have not ruled out any possibilities, including foul play, abduction, or voluntary disappearance.
Zwang and Fan, described by neighbors as a quiet and private family, left without any obvious signs of a planned departure. Surveillance footage and witness accounts remain sealed by investigators. Their home showed no signs of forced entry or struggle, investigators said. The disappearance has triggered concern from local residents and family alike.
Efforts to locate the couple intensified when the FBI joined the investigation in early June. Investigators have not revealed whether passports or financial accounts have been accessed, or presented any concrete leads. The growing sense of alarm has led law enforcement and community groups to appeal for any information that might assist in the search.
The couple’s two sons—aged 20 and 12—have reportedly not heard from their parents since March. Community members describe the family as friendly and respected, and many in the suburban neighborhood have offered assistance to investigators.
In a separate but related development, national security concerns around Chinese nationals in the United States have received fresh attention. In early June, two researchers from China were charged with smuggling a dangerous agricultural pathogen into the U.S. via a University of Michigan lab, raising questions about the potential for foreign infiltration through academic channels. Additionally, five Chinese students at the University of Michigan were recently charged with misleading authorities about their presence at Camp Grayling, a military training site.
While there is no evidence connecting these incidents to the Old Brookville disappearance, they echo growing national concerns over the security of Chinese nationals within American borders, especially those engaged in sensitive academic programs.
Law enforcement continues to verify whether the couple had any recent travel plans or foreign contacts that might explain their disappearance. The FBI is providing supplementary support through its Missing Persons Unit and field offices.
Anyone with information regarding the whereabouts of JuanJuan Zwang or Peishuan Fan is urged to contact the Nassau County Police Department’s Missing Persons Squad at 516‑573‑7347 or the FBI’s New York Field Office.
