Gilgo Beach Serial Killer Suspect Once Stalked Employee Onto Birthday Cruise, Issued a Chilling Warning: "I Could Find You Anywhere"

Gilgo Beach serial killer suspect Rex Heuermann once bragged to a former employee that he could literally find her anywhere — including “in the middle of the ocean,” according to officials.

According to the New York Post, Muriel Henriquez spoke to CBS News’ 48 Hours about her former boss, saying that “going out shooting, hunting” was his passion.

Henriquez said Heuermann once demanded she tell him where she was going on a cruise she was planning for her 40th birthday.

“[I told him], ‘I’m going to be in the middle of the ocean, and you’re not going to find me in the middle of the ocean,'” she said. “And he said, ‘Oh, yes, I can,’” The Post reported.

Heuermann did find her also, Henriquez said. On day two of her trip, a white envelope containing a note from Heuermann was slipped under her door.

“The note said, ‘I told you I could find you anywhere,'” she said.

Heuermann, 59, has been charged with the murders of three of the so-called Gilgo 4 — the women found dead on Long Island’s Gilgo Beach in December 2010 — and he is also the prime suspect in the death of the fourth, as Front Page Detectives previously reported.

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Heuermann was formally charged with three counts each of first-degree murder and second-degree murder in connection with the deaths of Melissa Barthelemy, 24; Megan Waterman, 22; and Amber Costello, 27.

He pleaded not guilty at his arraignment and remains locked up at the Suffolk County Correctional Facility without bail, officials said.