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The dna is likely on her so that may or may not help in this situation. is there anything else they would be looking for? >> in any suspicious case you are always looking for trace evidence. dna may be one of the most essential components of that. you take fingernail clippings, maybe hair samples, looking for fibers, anything you can see on the body and fingernail clippings and other samples as necessary for dna. if it is her fiancé/boyfriend who did this they are known to associate with each other. i won't comment further because i'm not a dna analyst but it wouldn't be surprising to have an...

Gabby petito's family just issued a statement to the press and the knew media saying we want to thank the press and news media for giving the petito and schmitt family time to grieve. we will be making a statement when gabby is home and will contact you to arrange a time and location. they are awaiting the results of this autopsy report. what can you tell us at this hour? >> they know a great deal that hasn't been released yet. they finished looking at the remains. the external part, the injuries, taking whatever trace evidence, insect evidence might be on the body, examine the clothing, look ...

Could shape this investigation. if it confirms that it is -- it's the body of gabby petito. how would it play into this? >> well, the autopsy, neil, is going to show us a lot of information. it's going to show us cause of death. we also have to positively identify who this individual is. everybody is speculating that it's her body. that is not known for sure. we'll find out through the autopsy. the autopsy will allow us to look at cause of death and any signs of struggle, fibers, trace evidence we call it. look under her fingernails, check her blood. see if there's any alcohol or drugs in her ...

And important is to find out the manner and the cause of death here, but what we now have, and they are going to treat that entire area as a crime scene, and as a result of that, they are going to cordon off that area and keep it cordoned off, looking for any physical evidence or any trace evidence, anything that will help them to find out what actually happened to gabby here. at this stage clearly we do not know, but i can tell you, that this case when it comes to brian laundrie, the man who last from all indications saw her alive, he can turn quickly from a person of interest to a suspect pu...

Know. probably more of that than they have things they do know. what they have to do, john, take things they do know, like last known location of individuals or cell phones and work outward from that perimeter. they will try to retrace everybody's steps, not just hers, but his, and see what point they can prove they were together and then start identifying what point in time, also in terms of geography and time and place the two my have diverted from one another, they were no longer physically together. i'm afraid quite a number of days has gone by before she was reported missing, so if there ...