What is the DL-6 incident?

The DL-6 incident refers to a pivotal case in the "Ace Attorney" video game series, specifically in "Phoenix Wright: Ace Attorney." It involves a murder that occurred in a subway train, where a young girl, known as DL-6's victim, was killed, and her father was wrongfully accused and convicted of the crime. The incident plays a crucial role in the backstory of several characters, including Phoenix Wright and Miles Edgeworth, shaping their motivations and relationships throughout the series. The case highlights themes of justice, memory, and the impact of past events on the present.