Murder He Wrote is a secret achievement/trophy in the System Rift expansion for Deus Ex: Mankind Divided. It is awarded for collecting the four pieces of evidence about Simona Saridakis' murder from the Palisade Blade.
Before entering the Blade, you must first talk to Niko Saridakis on the steps of the building and listen to what he has to say about his wife's death. Although talking to him does not initiate a side mission, it is necessary to trigger the optional objective later on.
The first piece of evidence can be found on the computer of Leona Rosolova, located in her office on level 3 of the Blade. Read her e-mails and one of them will contain information related to Simona's death. The next piece is in the same area as Rosolova's office, but instead of level 5. Read the e-mails on Ashani Talwar's computer and similarly, one of them will hold a clue.
The last two pieces are located in the Blade's server farm. Navigate to this part of the building, and search chamber 209. This room is filled with toxic gas, but it can be turned off using a valve in the room leading into chamber 209. At the back of 209, partially hidden, is a pocket secretary. Finding and reading it gives you the third piece of evidence. The final piece is required to progress in the main mission, and is located in the office of Palisade's CTO, Masaaki Oshiro. It is a pocket secretary hidden behind a pair of boxes on one of the desks. Reading it will award you the achievement.
- The title of the achievement references the television show Murder, She Wrote, about an amateur detective and mystery writer.