investigators believe greg mulvihill was being hunted. a stranger offered to turn over potentially damaging information. but instead, led greg into an ambush. scouring the scene, police do not find the gunman, but they did tracked down a promising clue. one it was about to leave detectives to a startling discovery. once again, here is andrea cannon with the light of the new man. >> reporter: greg mulvihill had been shot and barely survived. someone had lured him to the scene of the crime with a call from a burner phone. now, police gathered around the sergeant computer screen to see security camera images of the person who bought the burner. who wants a? >> it was diana lovejoy. >> reporter: diana lovejoy, greg mulvihill soon-to-be ex- wife. is this a smoking gun getting this photo of diana lovejoy? >> it points us in a direction. there is a lot more to be done. >> reporter: the team searched for more evidence in diana's home. >> we were able to locate the clothing she was wearing when she purchased the phone. >> reporter: police had enoug