Investigators will be back in SoHo Monday as they continue to dig for clues in the disappearance of Etan Patz, who vanished while walking to his bus stop more than 30 years ago.

The FBI and the NYPD returned to the basement of 127 Prince Street on Sunday to dig through dirt as they look for signs of the six-year-old boy who's been missing since 1979.

Crews finished ripping up the basement's concrete floor on Saturday.

A day prior, NY1 reported that investigators found a suspicious stain on a wall and were having it tested.

Investigators say any materials being collected at the site will be sent to a Virginia lab for analysis.

People who spoke with NY1 in the neighborhood hope the excavation can solve the mystery.

"If nothing else this could be a way for the family to get a little bit of closure," said one resident.

"I hope something...you know...I hope evidence is found," said another resident.

At the time of Etan's disappearance, the basement in question was being used by a handyman named Othneil Miller, who was thought to be friendly with the boy.

Published reports say authorities sought a warrant to dig inside the building after Miller's ex-wife told federal investigators he raped his niece a few years after Etan's disappearance.

Miller's lawyer denies any wrongdoing.

No one has ever been prosecuted in Etan's disappearance.

A judge ruled convicted child molester Jose Ramos responsible for Patz's death in a civil suit.

He is currently serving a prison sentence in Pennsylvania.

Meanwhile, Cardinal Timothy Dolan says his prayers are with Etan Patz's family.

On Sunday, Dolan reflected on the family's suffering as he talked about the wounds of the Christian messiah, Jesus Christ.

"That family must be so wounded and every time something like this happens, that wound must be fresh again. So my love and my prayers and my solidarity are with them," Dolan said.

Cardinal Dolan recalled hearing about Etan's disappearance when he lived in St. Louis in 1979.