Leonard Knox is one of the new Assistant US Attorneys at the US District Court for the Southern District of New York.


Swearing-in CeremonyEdit

On the day he was set to be sworn in as a new AUSA, Leonard arrived exactly at eight and walked into the courtroom, despite Kate Littlejohn informing him that Sandra had arrived there first to wait. Inside the court room, Tina Krissman introduced herself and had the two sides sit on opposite sides, knowing they wouldn't want to sit together. She then explained to them what would be happening and introduced Nicholas Byrne, who gave a speech about their work and swore them all in.[1]

First CaseEdit

After being assigned the case of Madeline Locarno, which he believed was beneath him, Leonard went to Roger Gunn's office and asked to be re-assigned to Seth's terrorism case. He convinced Roger and ended up with the case of Mohamed Fayed, accused of attempting to bomb the Statue of Liberty, the case he wanted. He offered a deal for 15 years, but Sandra rejected it after speaking to Mohamed. They went to trial, where she argued that the government had created a terrorist when he otherwise wouldn't have been one. Despite this argument, the jury returned a guilty verdict.[2]


After winning the terrorism case, Leonard was disappointed to get a fairly minor follow-up case. He believed Roger was trying to test him. In order to convince Roger that he had something to offer, he brought his mother, a US Senator, to the office to introduce her to Roger. Despite this, Roger still gave him run-of-the-mill cases.[3]

Bart McKennaEdit

When Leonard learned that Bart McKenna was on a ship stranded in the middle of the Hudson River, he made a plan to have the boat towed to Manhattan so he could steal the case for the Southern Court. However, a storm made that dangerous, so he made a deal with Hanna to wait out the storm and wherever it ended up, the closer court would get it. He then used Seth's knowledge of meteorology to learn that the ship would end up in New Jersey. Then he arranged for several NYPD officers to had lunch at the port where the ship would be towed in just as it arrived, thus bringing the case back to the Southern District.[4]

Freddie MorrisEdit

Leonard saw Arturo Marquez a piracy case on the news and asked to be put on the case. Roger said no and instead assigned him to prosecute Freddie Morris, aka Captain Shadow, a man who attacked a tourist believing he was stopping a kidnapping. The tourist was merely chasing his own toddler and Freddie broke the man's collarbone when he attacked him. He was released on bond with a curfew and instructions to turn over his superhero costume. Sandra met with Leonard to try to make a deal and Leonard offered six months, which Sandra said was too much. He lowered the deal to three months, but she wasn't able to convince Freddie to take it. Leonard suggested he meet with Sandra and Freddie to sell the deal. He told a fabricated story of tying a towel around his neck and jumping off a roof, which broke his ankles. He convinced Freddie to take a deal to serve a month. Freddie was given a week to sort out his affairs and then he had to report to jail.[5]




Hanna FaneEdit

He has a sexual relationship with Hanna, a prosecutor with the eastern district. He used this to his advantage when he learned she had a case. He ended up stealing the case for the southern district.[6]

Kate LittlejohnEdit

Leonard began to suspect that Kate had feelings for him after she invited him to have dinner with her. He asked Kate if they would work together, but she denied any intent on her part to ask him out romantically.[7]


His mother is a US senator.[8]

He appeared in her campaigned ads starting at the age of ten.[9]



Roger GunnEdit

Roger is the Chief of the Criminal Division in the U.S. Attorney’s Office, overseeing the newest lawyers in his department.


Leonard is an Assistant US Attorney. he became a prosecutor because they hold all the cards.[10]

Notes and TriviaEdit

  • He's the first and so far only character to have his name included in an episode title.
  • He likes Marvel characters and can't stand Superman.[11]


A more complete gallery with pictures of Leonard Knox can be found here.

Notable EpisodesEdit

Memorable QuotesEdit