What evidence is there that the Apostle Paul had been a member of the Sanhedrin? I remember hearing someone make the claim that Paul had been a member of the Sanhedrin prior to his conversion to Christianity.  Is there any evidence for this claim?  If so, what is it?
Stephen was stoned by the Sanhedrin and Paul (then named Saul) was present. The full story is told from Acts 6:8 to 7:60 but the relevant verses are:

Acts 6:12b:


  They seized Stephen and brought him before the Sanhedrin.


(6:15 also shows they were in the Sanhedrin.)

And Paul's presence is shown in 7:58b:


  Meanwhile, the witnesses laid their clothes at the feet of a young man named Saul.


Final note: in Acts 23:6 Paul himself appears before the Sanhderin and calls himself a "Pharisee".