Deangelo would never be seen again but his fate was later revealed. It turns out that Deangelo went brain dead after the accident. Darryl (Craig Robinson) mentioned that Deangelo was dead, but Andy clarified that he wasn't dead, per se, though his brain was.

Is D'Angelo from The Office dead?

In "Lotto", Deangelo was mentioned by Darryl saying that he's dead, but Andy corrects him saying he's technically alive, and is only brain dead.

What episode does Deangelo die in The Office?

"The Inner Circle" is the twenty-third episode of the seventh season of the American comedy television series The Office and the show's 149th episode overall.