While playing Fortnite Battle Royale, I have seen many good players that kill me, and I always want to add them as a friend, so they could carry me. Most of these people are already friends with my friends on Fortnite. Is there a way to add a player as a friend in game if they kill you? (Not in LTM's just Squads, Duos and Solo.)
Not in game.
Once a player kills you the game will show you their name, so once you return to the lobby you can add them through the friends feature.