It's not a victim impact statement, as the victim can no longer speak. It's effectively a lawyer writing one in place of the victim, and then using a fancy puppet show to portray the victim as saying it.
The family, in some cases friends, coworkers, etc, are also considered victims of this crime, for the intent of these statements. This was their statement on behalf of his sister, not a posthumous statement by the deceased.
Then let them make it in their own names.
And not, as nitwit005 aptly puts it, speaking through a puppet.
>"Hello. Just to be clear for everyone seeing this, I'm a version of Chris Pelkey recreated through AI that uses my picture and my voice profile,"
They did make it in their own names, there was never any implication that it wasn’t.