circumstantial
adjective uk/ˌsɜː.kəmˈstæn.ʃəl/ us/ˌsɝː.kəmˈstæn.ʃəl/
（尤指关于犯罪）间接的，按情况推测的
containing information, especially about a crime, that makes you think something is true but does not completely prove it
circumstantial evidence 间接证据
The case against her was circumstantial. 对她不利的论据是推测而来的。