Which character's testimony significantly impacted the case against Walter McMillian?

The testimony of Ralph Myers is significant in the case against Walter McMillian because he played a crucial role in creating the narrative that ultimately led to McMillian's wrongful conviction. Myers initially implicated McMillian in the murder of Ronda Morrison, claiming to have witnessed the crime. His statements, which were later proven to be fabricated, were pivotal for the prosecution. They provided the foundation for the police investigation and helped to establish the timeline and circumstances that led to McMillian's arrest. This false testimony highlighted the broader themes of injustice and corruption within the criminal justice system that Stevenson addresses throughout the book. Myers later recanted his statements, which further illustrated the fallibility of eyewitness accounts and the pressures that can lead to wrongful accusations. His testimony serves as a key example of how systemic flaws in the legal process can contribute to devastating consequences for innocent individuals.