A former employee of accused serial killer Rex Heuermann says he once bragged to her that he could literally find her anywhere — including “in the middle of the ocean” — and did.

Muriel Henriquez, speaking to CBS News’ “48 Hours” about her ex-boss, said that “going out shooting, hunting, that was [his] passion, according to The New York Post. Once, she said, he demanded she tell him where she was going on a cruise she was taking 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.'”

On day two of the trip, Henriquez said, 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 was arrested in July and charged with the murder of three of the so-called Gilgo 4 — four women found dead on Long Island’s Gilgo Beach, not far from his home, all wrapped in burlap, as CrimeOnline previously reported. He is the prime suspect in the death of the fourth woman.

Burlap is indicative of “a hunter,” an expert says in a preview of the “48 Hours” episode.

Heuermann has pleaded not guilty to the murders.

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[Featured image: Rex Heuermann/Suffolk County Sheriff’s Office via AP]