AERIAL PHOTOS: Excavator digs up backyard of Gilgo Beach murders suspect Rex Heuermann

An excavator was seen in the backyard of Rex Heuermann's house in Massapequa Park on Monday
An excavator was seen in the backyard of Rex Heuermann's house in Massapequa Park on Monday. Photo credit Tom Kaminski/Chopper 880

MASSAPEQUA PARK, N.Y. (1010 WINS/WCBS 880) -- An excavator was seen in the dug-up backyard of Gilgo Beach serial killer suspect Rex Heuermann on Monday as investigators searched his Nassau County property for an 11th straight day.

The digging equipment was brought to the house on First Avenue in Massapequa Park over the weekend. Ground-penetrating radar and cadaver dogs were also used at the property.

Photos taken from Chopper 880 on Monday morning show most of the backyard was dug up.

The excavator was brought in over the weekend to dig in the backyard
The excavator was brought in over the weekend to dig in the backyard. Photo credit Tom Kaminski/Chopper 880
Ground-penetrating radar and cadaver dogs were also used in the search of the property
Ground-penetrating radar and cadaver dogs were also used in the search of the property. Photo credit Tom Kaminski/WCBS 880
Objects from the backyard were seen piled up in the front of the home, apparently to make way for the excavator
Objects from the backyard were seen piled up in the front of the home, apparently to make way for the excavator. Photo credit Tom Kaminski/Chopper 880

Meanwhile in the basement, police reportedly found a vault-like structure with a heavy door that was used to store hundreds of guns. It's unclear what else may have been found inside.

Suffolk County Police Commissioner Rodney Harrison said this will likely be the final week for daily searches of the home by investigators.

Police have been blocking access to the stretch of First Avenue where the home is since Heuermann's arrest on July 13
Police have been blocking access to the stretch of First Avenue where the home is since Heuermann's arrest on July 13. Photo credit Tom Kaminski/Chopper 880

It's unclear if Heuermann's wife, who filed for divorce last week, will return to the house with her two adult children. They've been staying at an unknown location. Heuermann remains in the Suffolk County Correctional Facility in Riverhead after he was charged with murdering three women.

The backyard seemed to be almost entirely dug up Monday
The backyard seemed to be almost entirely dug up Monday. Photo credit Tom Kaminski/Chopper 880
There appeared to be less activity overall compared to last week, when dozens of police were seen in the front yard
There appeared to be less activity overall compared to last week, when dozens of police were seen in the front yard. Photo credit Tom Kaminski/Chopper 880
Featured Image Photo Credit: Tom Kaminski/Chopper 880