HILADELPHIA (CBS) -- For 65 years, a little boy had no name, just an unmarked grave at Ivy Hill Cemetery on the outskirts of Northwest Philadelphia. Until now.

"The Boy in The Box" has finally been identified as 4-year-old Joseph Augustus Zarelli.

The Philadelphia police Department says they're still investigating Zarelli's murder and they need the public's help.

CBS3 has closely followed the investigation and kept the case on TV and online.

CBS3 Investigations was first to break that police had finally identified the boy.  

Here is a breakdown of what we know about who was once known as "America's Unknown Child."

Who is Joseph Augustus Zarelli?

Zarelli was born on Jan. 13, 1953.

Police said he lived near 61st and Market streets in West Philadelphia.

He has siblings, both on his maternal and paternal sides, police said. His mother and father are deceased.

William Fleisher of the Vidocq Society, which helped investigate the case, noted that "many of these men and women aren't with us anymore," but said he felt their presence in the room.  

Police declined to release their identities.

What happened?

Zarelli was found badly beaten and dumped along Susquehanna Road in Philadelphia's Fox Chase neighborhood in February 1957. Sources say his lifeless body was found placed in a bassinet box.

"The child had been severely beaten," Police Capt. Jason Smith said on Dec. 8. "He was unclothed, had been wrapped in a multicolored blanket and placed inside of a cardboard box."

Police said Zarelli died from blunt force trauma. He also had scars from what was believed to be an IV line.