Schema for testimony

Hi,

I've been wondering about how one would go about describing a testimony 
in a hearing or legal case. A testimony would have a speaker/witness, 
their testimony, and the hearing (an event?) they are participating in.

One may cite a video clip of said testimony. The relevant VideoObject 
could have an "encodesCreativeWork" property for a creative work, or 
could have an "about" property to describe the hearing Event. The latter 
seems to be a better fit.

Perhaps a new schema for a "Hearing" or "Trial" type that extends 
"Event" could be made. These events could have "witness" attendees, each 
of whom authors a "Testimony" CreativeWork. Does anyone have other 
suggestions?

-- 
Seirdy