all over the city after officer sean bolton gunned down on the job. >> new details emerging about the fateful moments before his death. >> memphis police are saying that gunman should be considered armed and dangerous. 29-year-old tremaine wilburn is wanted for first-degree murder after officer sean bolton was gunned down. a civilian ran to that officer and used his radio to call 911. here is that desperate call. >> please, please hurry up. >> what complex are you at? north side or closer to the street? >> summer lane. 48 summer lane. he's shot. >> officer is shot. >> officer bolton likely interrupted a drug deal, approaching that illegally parked car when the suspect got out of the passenger seat and attacked him.