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Sergeant nemeth said, it did not. >> we conducted an experiment to determine if it is possible for a person to secure their hands behind their backs in the fashion we found. >> they even showed a video demonstration, and while tying ones hands in a suicide is uncommon, the medical examiner said that it is not unheard of. >> people do it, the thinking is that they bind themselves so that they won't change their mind midway through, it's unusual at first glance but it does happen. >> the location of the apparent suicide note was also uncommon. >> is there was a message painted on the door leadin...

Inside the bedroom where rebecca spent her final moments. there was a rope tied to the bed. the other end had been looped around rebecca's neck. there were also two knives in the bedroom, apparently used to cut the rope. everything was swabbed for dna. >> dna profiles were only from rebecca. >> so what about rebecca's hands and feet being tied? didn't that show another person was involved? sergeant nemeth said it did not. >> we conducted an experiment to determine if it is possible for a person to secure their hands behind their back in the fashion we found. >> they even showed a video demonst...

To determine if it is possible for a person to secure their hands behind their backs in the fashion we found. >> they even showed a video demonstration and while tying ones hands in a suicide is uncommon, the medical examiner said that it is not unheard of. >> people do it, the thinking is that they bind themselves so that they won't change their mind midway through, it's unusual at first glance but it does happen. >> the location of the apparent suicide note was also an uncommon. >> is there was a message painted leading to the room, i'm going to show you a message, we will not be revealing w...

Injuries? and then take her own life? the sergeant showed photos from inside the bedroom where rebecca spent her final moments. there was a rope tied to the bed. the other end looped around rebecca's neck. there were also two nooifs in the bedroom. apparently used to cut the rope. everything was swabbed for dna. >> dna profiles were only from rebecca. >> reporter: so what about rebecca's hands and feet being tied? didn't that show another person was involved? sergeant nemeth said it did not. >> we conducted an experiment to determine if it is possible for a person to secure their hands behind ...

>> that message that was left on her phone was to inform rebecca of max's grave condition and imminent death. >> reporter: did rebecca blame herself for the child's severe injuries and then take her own life? the sergeant showed photos from inside the bedroom where rebecca spent her final moments. there was a rope tied to the bed. the other end had been looped around rebecca's neck. there were also two knives in the bedroom, apparently used to cut the rope. everything was swabbed for dna. >> dna profiles were only from rebecca. >> reporter: so what about rebecca's hands and feet being tied? di...