I'm talking about the person we were talking about before.
I mean the guy we were talking about a few minutes ago.
ーI'm talking about the person we were talking about before.
「さっき話していたあの人のこと話しているんだよ。」
the person we were talking about before で「さっき話していたあの人」と言えます。
ーI mean the guy we were talking about a few minutes ago.
「さっき話していたあいつのことだよ。」
the guy we were talking about a few minutes ago で「数分前（さっき）話していたあいつ」と言えます。
ご参考まで！
カナダ 
