Forensic scientist Lawrence Kobilinsky has been following the Etan Patz case since the 6-year-old first went missing in 1979. Koblinsky was at the scene on Friday when investigators found a "stain of interest" that was sent to an FBI lab in Virginia for analysis.
However, Koblinsky says finding skeletal remains is key because it can help determine the height, gender, ethnicity and most importantly any marks that might show "if the child was stabbed."
This morning, Kobilinsky explains to Ashleigh Banfield how modern technology will be used to analyze possible DNA in the case.