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on thursday at approximately 7:00, et cetera?" so i knew what time to be back. >> so meet me here on thursday night in the evening and you'll have some more cash in your pocket? >> absolutely. >> reporter: it was thursday, september 28, the evening of the murders. >> i arrived at mr. camm's house at approximately 7:00. >> reporter: he said he handed over the gun to camm wrapped in his gray sweatshirt. >> where's this happening? >> right outside the garage. so we exchanged pleasantries and my sole purpose is to simply get the $250 for the second weapon. >> reporter: boney says after a few minutes in the bronco, the wife and kids arrived and pulled into the garage. >> and what happens? >> i hear a little bit of commotion. it just sounds like something's not right. it sounds like they're arguing. and then, all of a sudden, i hear an immediate pop. and before i heard the "pop", i heard her say, "no," and it was -- a commanding, "no," like, "stop," and then, i heard a pop. then i heard the word, "daddy." >> reporter: two more pops followed. >> did you know what that was?