According to police, the man who confessed to the 1979 killing of 6-year old Etan Patz has been placed on suicide watch at a New York hospital.
BBC News reports that the suspect, Pedro Hernandez, was brought to Bellevue Hospital to get medication for another health issue, but was admitted and put on suicide watch for making "suicidal remarks."
Mr Hernandez was arrested Thursday after telling police he choked Etan Patz to death.
Police Commissioner Raymond Kelly said Hernandez allegedly lured Etan with a soda, BBC News reports.
Police went to the scene of the crime Friday, CBS reports. They were looking for forensic evidence and trying to establish whether Hernandez had suffered from mental illness and pedophilia.
After Patz's disappearance, employees at the store where Pedro Hernandez worked were interviewed, BBC News reports. Mr Hernandez, however, was not interviewed.
"I can't tell you why," Commissioner Robert Kelly said.
Robert Monticello, a filmmaker, who was a teenager and neighbor of Hernandez at the time of Etan's disappearance, described Hernandez as "civil," but also "reserved and pent-up," USA Today reports.
Hernandez was scheduled to be arraigned on murder charges Friday, CBS reports. May 25 is known as National Missing Childrens Day as it is also the anniversary of the day Etan Patz went missing.
Hernandez appeared in court Friday for his arraignment via video from his hospital room, USA Today reports.
Prosecutors charged Hernandez, who was 18 when he allegedly strangled Patz, with 2nd degree murder Friday. Hernandez pleaded not guilty to the charges.
Hernandez' court appointed lawyer, Harvey Fishbein, said Friday that he had not met with his client yet, CBS reports.
He asked reporters to be respectful of some of Hernandez's family members, which were gathered at the courthouse.
In 1979, Etan Patz vanished while walking to a bus stop alone for the first time, BBC News reports.
He was the first missing child whose picture was put on a milk carton.