A man used Melissa Barthelemy's phone to call her 15-year-old sister five times over five weeks. The calls were vulgar, mocking, sadistic — and operationally precise. Under three minutes each. From crowded Manhattan locations. The caller hung up on Melissa's mother and spoke only to the teenager. Law enforcement described his tone as emotionally flat, monotone, controlled. In the final call, he told Amanda her sister was dead.

Episode 5 of "The Seven." Melissa was 24, from Buffalo, living in the Bronx, working toward a cosmetology career. She'd started doing escort work through Craigslist because the salon job hadn't materialized. On July 12, 2009, she told a friend she was meeting a man. She deposited $900. She tried to call an ex-boyfriend who didn't answer. Nobody heard from Melissa again.

Prosecutors allege the burner phone she'd connected with traveled from Massapequa Park to Midtown Manhattan that day — mirroring Rex Heuermann's commute. Her own phone then traveled the reverse route. Her remains were the first found in December 2010 along Ocean Parkway. The phone calls, the commute trail, the search history, and Melissa's full story — all covered here.

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