Who were the cunningham boys and what happened to them? whats the irony here

Active reading to kill a mockingbird, twelve through twenty-one during the trial, atticus questions four witnesses. as you read, complete the chart below by noting the key information given by each witness during questioning. also note how each witness behaves on the stand, commenting on the general impression the witness makes. answer for the following characters: the sheriff, bob ewell, miss ewell, and tom robinson.