'I Can Move On:' Sister Of Gilgo Beach Victim Reacts, Reports Say

WEST BABYLON, NY — The sister of one of the Gilgo Beach victims is reacting to the arrest of Rex Heuremann.

Kimberly Overstreet, sister of Amber Costello, 27, whose remains were found in 2010 on Ocean Parkway, said she is grateful for a break in the case, reports said.

"It brings me peace to know that my sister is laying with my family," Overstreet told News 12. "And that if my parents were here, if my sister was here, she would say 'Thank you, and I forgive him.' I forgive him and she would too. I don't know if it makes a difference to him, but it makes a difference to me, and I can move on."

Costello, was working as a sex worker and living in West Babylon at the time of her disappearance.

She had moved to New York from Clearwater, Florida and had completed a 28-day drug rehab, but had relapsed not long before her disappearance, police said.

Costello, who was 4-feet, 11-inches tall, and was a sex worker who advertised on Craigslist and Backpage to support her and her roommates’ heroin addiction, authorities said. Costello used the names Carolina or Mia and had tattoos of “Kaos” on her neck, a butterfly on her lower back and the word “Margeret” on her leg, police said.

Costello and her roommates shared a cellphone. When Costello would meet clients at her home, the two male roommates would often arrange a scam, during which, once a client had paid money, and before any sex acts occurred, they would confront the client saying Costello was their girlfriend and the client would flee, police said.

She was last seen on Sept. 2, 2010.

Her remains were found on Dec. 13, 2010, as one of the "Gilgo Four."

Investigators linked Heuremann to Costello through his usage of burner cellphones to arrange meetings. He also used the burner cellphones with at least three of the Gilgo Four, before and after their deaths.

By detecting signals off phone towers, prosecutors traced a burner phone to near Costello's home and Massapequa Park.

Heuremann also made taunting calls made to a relative of Barthelemy and checked the voicemail on Brainard-Barnes’ cellphone after her disappearance, prosecutors said.

A Chevy Avalanche connected to Heuermann was covered in a tarp and strapped to the back of a NYSP tow truck that rolled into the impound lot of the Chester County Sheriff's Office during Tuesday afternoon's press conference in South Carolina, Fox News reported.

One witness who is believed to have seen Heuermann told police how Amber Costello had tricked him out of money and that they saw him get into a Chevrolet Avalanche, which was later traced to him by its car registration.

Heuermann is believed to have picked up Costello the second and final time in the Chevy.

His DNA was also entered into a statewide database to see if it matches any other unsolved crimes, according to a report.

Las Vegas and Long Island law enforcement also continue to investigate the case.

Suffolk County Police executed a search at another storage facility in Amityville on Tuesday, in connection to the Gilgo Beach murders investigation, News 12 reported. It wasn't immediately clear who the storage unit belongs to.

At a press conference on Friday, Suffolk County Police Commissioner Rodney Harrison said that the investigation into the Gilgo Beach killings isn't over.

"Even with this arrest, we're not done," he said. "There's more work to do in this investigation regarding the other victims, the Gilgo Beach bodies that were discovered."

He also encouraged anyone with more information to call the Gilgo Beach hotline: 1-800-220-TIPS or to submit at tip on the Gilgo News website.