- Sinclair: "You enjoy being her little boy toy, don't you? That's why you keep running back to Annalise again and again, so she can fight your battles for you. You prefer to have her boss you around. Tell you what to do. Like hire her bestie and kill Nia."
- Nate: "Keep my wife's name out of your mouth! Say her name again. Say it!"
- — Nate Lahey and Emily Sinclair[src]
For twelve years, Nate worked for the city of Philadelphia as a detective. At some point, his wife was diagnosed with cancer.
After coming up with an idea that could be useful in Gina Sadowski's trial, Wes Gibbins hurries over to Professor Annalise Keating's office, where he finds her getting ready to have sex with Nate Lahey. The detective tells Wes to get out. Annalise leaves the room to meet Wes in the hall; Wes presents his idea, but is told that it's not good enough. A couple days later, Nate is called to the court as a witness. Annalise asks where he was the night Detective Gill supposedly acquired the video that incriminates Gina. Nate states that he was "at a friend's." Annalise finds it odd that it took so long for evidence to get logged into the computer, but Nate tells her that sometimes that's what happens. Annalise asks if Nate has ever known them to alter video footage to help the prosecution get a conviction. He states that he has, thus winning Gina's case.