No, because it would be lying and 'Do not lie' is one of the 10 commandments.
I myself, as a victim of crime, would be extremely hurt to discover that someone had commited perjury for a guilty defendant.
We all want to protect the ones we love but sometimes we must act with tough love - in protecting justice, protecting the public and protecting any guilty defendant.
I STRONGLY urge you not to do perjury as it is a CRIME!
Please!!! xxx