reporter: denita smith probably never saw it coming. one shot, a clean hit from behind. the killer was apparently lying in wait on the apartment s second floor landing as denita walked down the stairs from her third floor unit, said durham police detective shawn pate. there were four apartments on that landing. i think that someone was there pretending they were knocking on the door or fumbling for keys. reporter: so denita probably would have had to walk right past the shooter? probably good morning, how are you, then turn and go down the steps. reporter: bang. and that s it. reporter: denita murdered. executed in broad daylight. it made no sense. her bff edythe says denita simply didn t have any enemies. denita was a light in this dark world. she had a beautiful spirit. she was loving. she was kind. she was supportive.
broke it off. they did. reporter: a year before denita was killed? a year. reporter: now after the murder, word of jermeir s two-timing spread quickly. denita s mother, sharon. i m angry. i m mad. because it never should have happened. you were in a serious relationship. you know, why you felt you had to step out, don t understand. you don t hurt the ones you love. reporter: the divorce rate in this country would suggest that we hurt the ones we love all the time. that s true. but it s kind of bad when you going into the marriage being foul. not saying that it s okay once you re in it. but you would just like to think, you know, you re starting things off right. reporter: edythe kearns was barely beginning to process the loss of her close friend, and now had to cope with something else she had never imagined. i was just sad. and i was hurt. and i was in shock. just disbelief. because i had nothing bad to say about him. reporter: this wasn t jermeir?
stroud, denita s fiance, a police officer who worked in greensboro, much closer to durham. and i said, jermeir, i need you to get to durham now. denita has fell. she s unconscious. they re trying to revive her. so he said okay. because i knew from greensboro to durham he would be there before i would. could you tell whether he had any idea of this? he didn t let on like he was aware. reporter: word spread fast that something had happened at the apartment complex. the apartment complex.. edythe called to check on denita. and she wasn t answering. which was you know, after i call your phone several times as a best friend, you know, somebody s going to call you back. so i was like, that s strange. so my instinct just said call jermeir really quick just to touch bases with him. reporter: by now jermeir stroud had left work and was racing to durham. i spoke to jermeir. and i m like, have you made contact with her? but i felt like i didn t get a definite answer. it seemed l