Gilgo Beach murders: How 'meticulous' Rex Heuermann tried to plan the 'perfect crime'

Admitted Gilgo Beach, New York, serial killer Rex Heuermann confessed to the murders of eight women last week, bringing resolution to a 17-year killing spree that terrorized Long Island.

"If I could speak to Rex face-to-face, I would tell him that he has no heart, no soul, he is a monster," Liliana Waterman, whose mother, Megan Waterman, was among the victims, told ABC News.

Here's a look inside the infamous case: Targeting and killing sex workers Heuermann used an alias to communicate with and target sex workers, prosecutors said.

From 1993 to 2010, he strangled his victims and dumped most of their bodies near Long Island's Gilgo Beach, according to prosecutors.

All the while, prosecutors said the New York City architect hid in plain sight, living on Long Island with his wife, daughter and stepson.

Heuermann "walked among us, play acting as a normal, suburban dad, when in reality, all along, he was obsessively targeting innocent women for death," Suffolk County District Attorney Ray Tierney said at a news conference last week.

Heuermann's 'meticulously planned' crimes Prosecutors said Heuermann -- who amassed an extensive collection of torture pornography and kept newspaper and magazine clippings about the Gilgo Beach killings -- "meticulously planned" his crimes.

He kept a list of supplies, locations of "dump sites" and reminders for the future like to "consider a hit to the neck next time," prosecutors said.