At the defendant's trial on a robbery charge, a government witness, ehle, testified that the defendant had taken part in the crime. the defendant later called a witness, mills, who testified that ehle had told mills in prison that ehle intended to implicate the defendant falsely.

1.  Quizlet:
At the defendant's trial on a robbery charge, a government witness, Ehle, testified that the defendant had taken part in the crime. The defendant later called a witness, Mills, who testified that Ehle had told Mills in prison that Ehle intended to implicate the defendant falsely. On cross-examination, the prosecutor then asked Mills if he and the defendant were members of a ''secret type of prison organization'' that had a creed requiring members to lie and kill for each other.

If the defendant objects to the prosecutor's question of Mills as irrelevant, how should the court rule? By what chain of inferences might this evidence be relevant to the defendant's guilt?