Can this person find out where i live?

hi i posted a question before about how i was looking for a puppie and i found this ad on pennysaver and i found this free yorkie and i sent this person etatisang@yahoo.com a email and this person said that they just relocated to cameroon and if i would adopt the pupies then i said no **** off scammer because i knew this was a scam. then they said that i will pay and i was scared and i said please dont kill me ill call the cops and they said no that i insulted them and their coming for me and they said the cops wont help. the person has not contacted me and he or she said that they had all my details and im scared can this person find my information and come and kill me im not sure if they really are in cameroon they could end up living next to me please help