Why was osvaldo's testimony important in monster?

Osvaldo's testimony in "Monster" was crucial because it highlighted the complexities of the case and the unreliable nature of eyewitness accounts. His statements revealed the influence of fear and peer pressure on his perceptions, ultimately casting doubt on the prosecution's narrative. Additionally, Osvaldo's character served to expose the moral ambiguities surrounding gang involvement and the consequences of loyalty, making his testimony a pivotal moment in the trial.