Riley heard the shot go off just as the guy started to choke her, she looked up to see where the shot landed. The girls shot landed right in his chest near the heart, he slides right off her and on his side clutching his chest for what she hopes to be his last few seconds of life. 

Riley got up and looked at the girl before slowly walking over to her and the gun. She bent down to pick up the pistol and walk over to the guy then aimed the pistol at his head and fired. 

”he's dead now,” she turned to look at the girl and then holster her gun to show her she meant no harm for now. ”nice shot and I guess... Thanks for saving me.” she said then heard a groan outside from the guy still alive. ”look I gotta take care of him so either leave or go upstairs to the third floor and maybe we can trade or some shit like that.” she left without hearing her reply, she kinda hoped she left but a part of her was kinda getting lonely and she hoped she will stay for at least a few hours.