I just finished watching Season 14 Episode 10, and it has David Smith. now is David Smith the little child that Emily Prentiss was wanting to adopt early on?
No, I believe you are talking about Carrie Ortiz from "Children of the Dark" which is Season 3 Episode 4, this is the episode where her parents and brother get killed but she survives because the Unsub thinks Carrie reminds him of his younger sister.
Yes to the previous response. You might be thinking about how Emily felt a little guilty that she didn't keep tabs on David Smith after his Dad was arrested in S3E2 In Name and Blood.