In the novel Monster, did Steve Harmon receive a fair trial?

Yes. I believe that Steve Harmon received a fair trial throughout the novel Monster by Walter Dean Myers. The testimonies of both Richard "Bobo" Evans and Osvaldo Cruz were unreliable, and the jury took into account that both witnesses benefited from testifying against James King and Steve Harmon. Although the prosecuting attorney mentions that Steve collaborated with James King about the robbery, Petrocelli does not state that Steve was ever in the store. The State's other witness, Lorelle Henry, did not testify to seeing Steve in the store before the robbery. Also, Steve did not give a signal to Evans or King, and did not receive any payment following the robbery. The only evidence to suggest that Steve was involved in the crime was simply hearsay from James King, Bobo Evans, and Osvaldo Cruz. Without substantial evidence to prove that Steve Harmon was a co-conspirator, the jury made a just decision to rule Steve not guilty in the murder of Aguinaldo Nesbitt.