person who is responsible for this? this child was put in a garbage bag, disposed on this remote island. >> obviously, horrible horrible case. when first heard about this case i immediately thought that this child could have been a victim of human trafficking or a victim of a sexual predator. i would -- they are probably doing this at this point in time. start checking with all registered sex offenders in boston and make sure their time has been accounted for. >> that's horrible to imagine. how much can the forensics tell them about how she died? to the point art is making whether there was a sexual predator involved? anything like that? any information at this point. sglt forensics can tell a lot. they can get dna. they will get bone samples, hair samples. there's probably fabric involved. all of that will tell part of the story. the question is is there dna in the database to match her to somebody to link her to a community or to a family?