"Avalanche" of evidence: How a Chevy, a strand of hair and a pizza box led police to the Gilgo Beach suspect

Suffolk County District Attorney Raymond Tierney revealed details about the investigation into the arrest of Rex Heuermann, 59, saying it involved more than 300 subpoenas and search warrants. 

"This case is not over; it's only beginning," Tierney told reporters Friday afternoon of the probe into the long-unsolved killings of women whose bodies were found on Long Island's Gilgo Beach more than a decade ago. "We're continuing to execute search warrants and anticipate getting more evidence."

In court Friday, Heuermann, of Massapequa Park, pleaded not guilty to three counts of first-degree murder and three counts of second-degree murder in the deaths of Melissa Barthelemy, Megan Waterman and Amber Costello, according to the indictment. Those three women, along with Maureen Brainard-Barnes, were all found in close proximity to one another in 2010 and have been called the "Gilgo Beach Four."