Legal Question in Criminal Law in California

Re: supeona

You can die, suffer from advanced alzhiemers disease, become insane, or otherwise lose your mind.

Re: supeona

On the more serious side you can petition the court to quash the subpoena. The grounds for such a motion are limited, and difficult to present to the court. Lack of proper service, or violation of a privilege, such as attorney client,

Re: supeona

Aside from physical or mental disability, the only other way is if what you would be testifying to would lead to evidence that would be incriminating to you, or if there were some sort of privilege that you held that would allow you not to testify such as if you were a priest and the questions were related to a confession you received. However, none of those things prevent you from having to show up to assert those privileges.

Good luck,