Final answer:
Walter McMillian had several important allies, including attorney Bryan Stevenson, who worked to prove his innocence. Community members and activists also supported McMillian's case.
Step-by-step explanation:
Walter McMillian, an African American man wrongly convicted of murder, had several important allies in his fight for justice. One of his key allies was attorney Bryan Stevenson, who took up McMillian's case and worked tirelessly to prove his innocence. Stevenson was eventually able to gather evidence and witnesses that showed McMillian was not at the crime scene and had an alibi. Additionally, other supporters of McMillian, such as community members and activists, played a crucial role in raising awareness about his case and putting pressure on the authorities to reexamine the evidence.