me. >> so she wrote to them again. >> i said, all right, i know they're there, i have photographs of it, i know they're there, send me the results, and then they sent them. >> and? the tests were conclusive, there was no gunshot residue on brad's black bath robe, just as there wasn't any on his hands on the night lisa died, meaning brad almost certainly did not fire the gun that killed lisa. but why didn't lead investigator dan nash reveal that? well, he said he never received those results. plausible? >> not in a heartbeat. no, i was a prosecutor before this. my spouse is a police officer. dwight is a police officer. we know the care that goes into building a case, and that's not a step that you skip. dan nash had specifically asked for that test to be done. >> so by now dwight was looking carefully at dan nash. he talked to a retired judge. >> and he made it very clear