it was thaddious brandishing a gun.at must have really heightened -- >> oh, the video was -- >> reporter: --your suspicion. >> --huge. i was positive at that point. >> reporter: he did it. and heather wasn't the only one pointing the finger at thaddious. halee's friends knew that she'd gone to see the baby's mom jordan the night she died. >> there's these messages the night she was murdered, where she was messaging back and forth with jordan, "hey, i'm gonna go pick up my wallet from your house" late at night the night she was killed. so then that was the theory. she went, she told jordan, thaddious killed her over it. >> reporter: investigators decided it was time to find out what thaddious and jordan knew. thaddious refused to talk to them. but jordan did. >> we did interview thadious girlfriend. she was -- she said they were home together all night at thaddious's brother's house. >> we checked out the surveillance video from that neighborhood we were able to see halee come into the neighborhood when she was there to