MTG Salvation

Ok, I'm fairly new at magic in general and the person that has been teaching me takes advantage of the fact that I am new at the game frequently. Here is my question, if my opponent has fiendslayer paladin out and I kill it, can I then exile it from his graveyard with vile rebirth? My friend says the ability still applies when it is in his graveyard but that has conveniently never been brought up before. Any help would be appreciated.

Whoops, my bad. But thank you for your help.

Ok, I'm fairly new at magic in general and the person that has been teaching me take advantage of thw fact that I am new at the game frequently. Here is my question, if my opponent has fiendslayer paladin out and I kill it, can I then exile it from his graveyard with vile rebirth? My friend says the ability still applies when it is in his graveyard but that has conveniently never been brought up before. Any help would be appreciated.