investigators believed greg mulvihill was being hunted. ver potentially dangerous information but instead, lead greg into an ambush. scouring the scene police did not find the gunmen, but they did track down a promising clue. one that was about to lead detectives to a startling discovery. once again, here's andrea caning with "the night of the new moon." >> my friend has just been shot. >> greg mulvihill had been shot and barely survived. someone had lured him to the scene of the crime was a call from a burner phone. now, police gathered around sergeant darbie ernst's computer scene to see images of the person who had bought the burner. >> who was it? >> it was diana lovejoy. >> diana, greg's soon to be ex-wife. >> is this a smoking gun? getting this photo of diana lovejoy? >> it definitely points us in a direction. there is a lot more to be done. >> sergeant ernst's team search for more evidence in diana's home. >> we were able to locate the clothing that she was wearing when you purchase the phone. >> police had enough to arrest diana and