updated 01/10/2012 AT 4:00 PM ET
•originally published 01/10/2012 AT 4:15 PM ET
The family left under cover of darkness at 1:30 a.m. Tuesday, the New York Daily News reports.
Observers noted a procession of vehicles with blacked-out windows leaving from the hospital s side gate, reports the newspaper. Two black SUVs helped facilitate the departure, with one blocking traffic so the other could move unobstructed.