California, United States of America
The following excerpt is from People v. Puglizevich, F061368, F062703 (Cal. App. 2013):
The trial court loses the power to modify a valid sentence to increase appellant's punishment after he begins serving his sentence. (People v. Thomas, supra, 52 Cal.2d at p. 531.) But, in this case, it is clear from the record that appellant wanted to be remanded to prison promptly and not only agreed to, but expressly requested, the later imposition of restitution fines.
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