Pedro Hernandez was taken to Bellevue for treatment for a pre-existing condition, police said.
Pedro Hernandez, 51, was arrested by the NYPD Thursday for allegedly murdering Etan Patz.
Pedro Hernandez told cops "I did it" and that they'd never find Patz's body, sources said.
While the FBI dug for Etan Patz's remains, 15 abducted NYC children were still missing.
No "obvious" human remains were found in the in the search for Etan Patz at 127 Prince St., cops said.
The "stain of interest" was found at 127 Prince St., where the FBI is searching for Etan Patz.
Investigators have taken out concrete floor of Prince Street building where Etan Patz may be buried.
FBI and NYPD remove concrete slabs from Prince Street basement in search for Etan Patz's body .
FBI investigators were on Prince Street Thursday to investigate the disappearance of Etan Patz, 6.
The DA resumed an abduction investigation into a SoHo boy who has been missing for 31 years.
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