Hi Carmen. The sad fact is that many many young people are estranged from their families for many reasons - they come from abusive homes, they run away with boyfriends, the get into using drugs, etc. So many reasons. Yes, it's hard for many of us with close families to understand, but it does happen, and it happens a lot (especially during the era these two were found murdered). Families may look for them or wonder about them, but not to the extent of reporting them missing or of providing dna. Another sad fact is that someone may be reported missing - but only to the local agency, and that information is not passed on to a national database. The whole system, imho, is a sad mess and needs some serious organization.