Police on Long Island have resumed their search for missing New Jersey prostitute Shannan Gilbert. Laois-born Police Commissioner Richard Dormer said last week that they believe she was one of the victims of the serial killer who is still at large on Long Island.

Dormer also made it clear that the police now believe that one serial killer is responsible for the deaths of ten people found in the area over the last year. Some of these murder cases date back to 1996.

Last December, four bodies were found around the barrier beach and another six were discovered close by later in 2011.

On Monday, 35 police officers from Suffolk and Nassau counties searched the area once more, accompanied by three cadaver dogs.

Officials told NBC that the search resumed after the FBI aerial surveillance team working in the area over the summer spotted items of interest which needed more scrutiny.

Dormer had previously believed that the ten murders were the work of three separate killers.

However, last week he retracted this theory and now believe they are the work of a lone killer.

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Although he would not give a reason for his change of heart, he did note that all victims are linked to the sex trade.

He said that although Gilbert is likely a victim, the circumstances of her disappearance are different to the other victims.

Last summer, Shannan Gilbert went missing after meeting a client she had made contact with on the classifieds website, Craigslist.

Last December, four prostitutes’ bodies were found off the Ocean Parkway, wrapped in burlap. All of them went missing while meeting clients from Craiglist. At least one of the other six victims has been identified as a prostitute.

Here’s NBC’s report:

View more videos at: http://nbcnewyork.com.