The New York City Police Department said Friday that the investigation into the death of Etan Patz is still going strong.
Commissioner Ray Kelly said the NYPD is "devoting significant resources" as it works with the District Attorney's office to figure out what happened when the six-year-old went missing in 1979.
"The investigation is going forward aggressively," Kelly said. "We are gathering information, talking to a lot of people. Obviously, something that happened 33 years ago, it is a challenge to gather that information."
Pedro Hernandez was arrested just one day before the 33rd anniversary of Etan's disappearance after making a surprise confession.
Hernandez is now charged with second-degree murder.
His lawyer says he's schizophrenic.
On Thursday, Manhattan District Attorney Cy Vance Jr. said it is "premature" to say there's enough evidence to convict Hernandez of the boy's murder.