California Code, Penal Code - PEN § 920

The grand jury may investigate and inquire into all sales and transfers of land, and into the ownership of land, which, under the state laws, might or should escheat to the State of California. For this purpose, the grand jury may summon witnesses before it and examine them and the records. The grand jury shall direct that proper escheat proceedings be commenced when, in the opinion of the grand jury, the evidence justifies such proceedings.