. >> sefan kim has the story. >> joe and lauren, this 84-year-old victim says she barely remembers what happened. this massive man hit her so hard he broke her nose. she's never felt unsafe in her own home until now. >> i don't know if he hit me with something. actually, i think there was something in his hands and it was larger than his hand and i just got it right here. >> what does it feel like now? >> awful. >> she heard a knock at her door and she answered it and this man was standing there. the object he smashed her face with was a handgun breaking her nose. he never even spoke a word. the impact did this to her face, which is now badly bruised. when she got up off the floor, he was gone. this is surveillance video taken from inside the building. face. cops say he preys on vulnerable victims, elderly women. >> he needs somebody to just grab him and put him somewhere where he can't get out, like jail. >> reporter: this is surveillance video police released after he preyed on a 96-year-old woman in park slope. he got into her home before choking her at gunpoint. last weekend an 81-y