Investigators are now scrutinizing Rex Heuermann’s ties to Las Vegas and South Carolina, where the suspect has owned property, as part of their nationwide investigation into the serial murders at Gilgo Beach.

A spokesperson for the Las Vegas Metropolitan Police Department verified in a statement that police are combing through their list of unsolved cases for any indication that Heuermann may have been involved.

According to property documents obtained by CNN, Heuermann and his wife purchased two timeshare condominiums in Las Vegas between 2003 and 2005 despite living on Long Island, New York. According to the records, the couple has since sold the first property, and it is uncertain whether they still own the second.

The 59-year-old architect and father of two was detained in New York City last week and charged with murder in the deaths of three of the “Gilgo Four,” a group of four women whose remains were discovered in 2010 along a brief stretch of Gilgo Beach on Long Island.

Heuermann has entered a not guilty plea for the murders of Melissa Barthelemy, Megan Waterman, and Amber Costello. He remains the primary suspect in the murder of Maureen Brainard-Barnes, the fourth victim, but has not yet been prosecuted in the case.

Asa Ellerup, Heuermann’s wife, applied for divorce on Wednesday, her attorney Robert Macedonio told CNN. On behalf of his client, Macedonio confirmed that a summons and complaint to initiate divorce proceedings have been lodged under seal in Suffolk County Supreme Court.

CNN was told by a source familiar with the case that authorities are searching Heuermann’s home, office, and storage unit under the presumption that he may have continued his alleged murdering rampage after the bodies of the Gilgo Four were discovered.

Since before the suspect’s arrest, the Chester County sheriff’s office in northern South Carolina, where tax records indicate Heuermann owns four large parcels of land, says it has been amassing evidence for the Gilgo Beach investigative task force.

Heuermann’s brother’s vehicle was towed by authorities late last week, according to Steve Caston, a neighbor who lives across a gravel road from the sibling and adjacent to Heuermann’s property. Caston described deputies lined up with “assault rifles” and “the whole nine yards” as they seized the vehicle, but said the scene was “pretty quiet” with “no screaming or yelling.”

CNN sources report that a Chevrolet Avalanche seized from the property is being searched for evidence.

Tuesday, FBI agents were observed conversing with residents of a rural South Carolina neighborhood. Two men in plainclothes identified themselves as FBI agents and asked Caston’s neighbor to contact them later that day, while a CNN crew was interviewing Caston at his residence.

Monday, Suffolk County Deputy Police Commissioner Anthony Carter stated that the multi-agency cold case task force is “actively investigating” the possibility that Heuermann may have had additional alleged victims as they sift through a deluge of new leads and evidence.

Suffolk County Sheriff Errol Toulon told CNN on Wednesday that investigators reinterviewed two sex workers in New York following the recent discovery that Heuermann allegedly propositioned them years ago.

The link was only recently discovered by cross-referencing one of Heuermann’s disposable phone records, according to the sheriff. According to authorities, whoever murdered the four victims used disposable phones to communicate with the victims.

According to Toulon, neither of the two re-interviewed women ever met Heuermann, who used an alias to contact them. Toulon reported that they characterized their phone conversations with him as “just like any other John.”

“We are now reaching out to not only every female in our custody, but we are also interviewing or at least establishing a relationship with those who were previously in our custody to determine if they know anything about him or had specific interactions with him,” the sheriff explained.

Monday, Police Commissioner Rodney Harrison stated that Heuermann’s family was shocked when they were informed of the gruesome allegations against him. They were revolted. “They were humiliated,” he stated.

A long-dormant investigation receives a deluge of evidence.

Inside the Investigation: Uncovering Forensic Clues and Sinister Souvenirs in Heuermann’s Home

According to a source with knowledge of the case, as investigators search Heuermann’s home, they are primarily focused on gathering forensic evidence but are also searching for items that could be souvenirs kept from the killings, including items that are hidden or stashed where family members wouldn’t find them.

According to the source, any recovered items will have to be shown to the victims’ family and acquaintances, which could take some time.

The search of the residence has so far uncovered a cache of 200 to 300 firearms hidden in a compartment behind a secured metal door – far more than the 92 firearms Heuermann was known to have registered in the state, according to a source.

Credit card invoices, mobile phone data, and DNA evidence are just a few of the pieces of evidence used by prosecutors to link Heuermann to at least three of the murders of the Gilgo Four.

The four women’s bodies were among 11 sets of human remains discovered along Long Island’s South Shore between 2010 and 2011, prompting “one of the most consequential homicide investigations” in the island’s history, according to the police.

Four women’s cases exhibited striking similarities almost immediately. Authorities reported that each set of remains was wrapped in camouflaged burlap and concealed along the same quarter-mile stretch of Ocean Parkway. According to investigators, the women who vanished between 2007 and 2010 were all escorts who advertised their services on Craigslist.

According to Suffolk County District Attorney Ray Tierney, it took investigators more than a decade to match DNA from a male hair discovered on the burlap wrapping to a sample of Heuermann’s DNA secretly collected from a pizza crust the suspect tossed away after the cases were reopened.

Using mobile phone and credit card records, investigators were able to identify several instances in which Heuermann was present when burner phones were used to contact the victims, according to the bail application.

Tierney told CNN on Wednesday that criminologists at the Suffolk County Crime Laboratory are examining each piece of evidence collected from the search warrants “inch by inch.”

“This is a tedious and lengthy procedure, and we’re going to allow it to run its course. The district attorney said, “We will inventory and analyze all the evidence before discussing it.”

Tierney stated that, as the investigation enters a new phase, detectives will conduct interviews with “a great number of people” in the coming days.

Even though prosecutors have identified Heuermann as the prime suspect in the fourth homicide of Brainard-Barnes, police commissioner Harrison stated on Monday that bringing charges in this case could “take a little time.” The investigators’ hair follicle must endure DNA testing, but it has been damaged, he said.

In the meantime, he stated, “It’s fortunate that we removed this animal from the streets.”

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Source: CNN