Gilgo Beach cops return to suspect Rex Heuermann's house on new search warrant

It is not clear what officials were looking for at the suspect's homeREAD MORE: Last month police with K9's search woods in Manorville 

Investigators and state police have swarmed the Massapequa Park home of alleged Gilgo Beach serial killer Rex Heuermann with a new search warrant.

Police arrived early Monday morning to the home where Heuermann's estranged wife, Asa Ellerup, and their two adult children, Victoria and Christopher, live.

Asa Ellerup's attorney Robert Macedonio told NewsNationNow that 'no family members were home at the time police arrived.'

It is not clear at this time what elicited Monday's search of the Long Island property or what officials were looking for.

The Suffolk County District Attorney's office declined to comment other than to say 'the work of the Gilgo Beach Homicide Task force is continuing.'

Investigators and state police swarmed the Massapequa Park home of alleged Gilgo Beach serial killer Rex Heuermann with a new search warrant. He is seen in court in February

An aerial view of police at the Massapequa Park home of alleged serial killer Rex Heuermann

Heuermann, 60, is awaiting trial and is facing murder charges, for killing four women whose bodies were found wrapped on a stretch of Ocean Parkway near Gilgo Beach. 

He was arrested in July and initially charged with killing Melissa Barthelemy, 24, Megan Waterman, 22, and Amber Lynn Costello 27. 

In February, he was also charged with the murder of Maureen Brainard-Barnes, 25. 

Heuermann pleaded not guilty to all counts and currently remains in jail awaiting trial.

Last month, it was revealed that a new search was underway in connection to the Gilgo Beach murder investigation.

Detectives began searching a wooded area in Manorville, New York in April.

The Suffolk County District Attorney's Office declined to comment on the specifics of the search.

The new searches came after the father-of-two's home in Massapequa was raided following discovery of the bodies.

The women were found wrapped in burlap and buried along the remote stretch of Ocean Parkway on Long Island's South Shore over a decade ago.

The women's remains were discovered during the search for 23-year-old Shannan Gilbert, an escort from New Jersey who had vanished in May 2010 after making a frantic 911 call.

Her remains were found along the same stretch of coast in December 2011 - and it was her body that led police to the discovery of the 'Gilgo Four'.

No one has ever been charged in Gilbert's death and police said it may have been accidental - but her family believe she was murdered.

The new searches came after the father-of-two's home in Massapequa was raided following discovery of the bodies

The first victim, 24-year-old Melissa Barthelemy, was discovered by Suffolk County Police on December 11, 2010. The body of Megan Waterman, 22, from Maine, was found two days later

Heuermann is also charged with killing Amber Costello (left) and  Maureen Brainard-Barnes (right)

Heuermann pleaded not guilty to all counts and currently remains in jail awaiting trial

The women were among 11 found on the desolate stretch of coastline close to Heuermann's Long Island Home between 2010 and 2011.

All of the victims worked as escorts who advertised themselves on Craigslist.

Heuermann was linked to the killings by DNA on the burlap used to transport the bodied which was compared to samples taken from a pizza crust and napkin that were discarded outside his Manhattan architectural firm, police said.

The samples boasted a 99.96 percent match, according to law enforcement.

Prior to testing the DNA, cops said they were alerted to Heuermann as a potential suspect after a witness linked Heuermann's Chevrolet Avalanche to Costello's murder.

The car was then tied to Heuermann's cellphone records, which allegedly linked him to locations related to the murders.

The indictment stated that Heuermann had used different burner phones to contact each of his victims.

The Heuermann family home in Massapequa Park was torn apart by authorities as they combed the property for evidence

The Suffolk County District Attorney's Office declined to comment on the nature of the new search. Pictured: Investigators suit up outside Heuermann's home last July

Cops also accused Heuermann of using Barthelemy's phone to make taunting phone calls to her family from the comfort of his office.

Her sister Melissa told how she was bombarded with threatening phone calls from the killer who boasted of the killing and was keeping tabs on her movements.

In October, it was revealed that Heuermann is being probed over the slaying of two additional sex workers.

Suffolk County Police Commissioner Rodney K. Harrison confirmed he had assigned additional investigators to the case of two other women, Valerie Mack and Karen Vergata.

At the suspected time of the murders, Heuermann's now ex-wife Asa Ellerup was away from home. She filed for divorce less than a week after he husband's arrest.