. >> reporter: detective elgis had questions. lots of them.ngs about this murder didn't make sense. >> you were right there? >> the other thing i don't understand is why somebody shoots him and you don't see anything. >> i don't know. i honestly don't know. >> reporter: maybe it was the man ben warned her about, she said, a rough customer who once dated ben's ex-wife dawn and apparently threatened to kill both dawn and any man she had been with. was the story true? just to be true, detective elgis sent officers to dawn's house where they woke her up, sleepy but unharmed, and discovered the man in question was hundreds of miles away when the murder happened. so again, the questions were for melissa. >> sometimes people know more than they want to tell the sheriff. and i really need it all. >> i honestly don't know. i don't know. >> reporter: alyssa was 6 by this time, was the only person who remembered seeing anything unusual. she told the detective right away. >> well, i was fast asleep. i woke up and i heard this creak. i saw someone walking