[cyncooper]

Where did Westerfield's attorney present a witness that he knew was testifying falsely?

Perhaps the witnesses didn't testify falsely. But he did present witnesses to try to mislead the jury.

For example, they presented a computer expert to try to imply that Westerfield's son was the porn collector.

Also Feldman produced pictures of investigators wearing orange in order to lead the jury to believe those items were the source of incriminating orange fibers found on the victim and in Westerfield's environment.

The prosecution, in rebuttal, refuted these points. But the fact remains the defense was spinning a tale for the jury they knew to be false.

[spqrzilla9]

Each of your examples are legitimate points for the defense to make to question the validity of the evidence the prosecution is presenting. In all the cases, the testimony was true and relevant.