So far as other accused are concerned,none of the prosecution witnesses ascribed any role to A-2,A-3 and A-12 and even though PW-15 deposed at the trial about the presence of A-4,A-6 and A-7 and stated that they were present with the accused party but the trial court,for good and sufficient reasons found that his testimony as regards their presence in the unlawful assembly,had not received trustworthy corroboration from any other prosecution evidence