>> that's all for this edition of dateline. i'm craig melvin. thank you for watching. watching i'm craig melvin, and this is dateline. >> i thought there was a burglar in my house. before i knew, would i fired four shots at the door. >> he is struggling a lot with what is happening, and he has to leave with the weight of it. she wasn't breathing. >> and in-depth look at the story that stunned the world. murder and the blade runner. olympic runner story is charged with the murder of his girlfriend. >> she's not coming back --