Green’s Dictionary of Slang

stat adj.

(US) statutory.

[US]T. Pluck Boy from County Hell : ‘Ora did ten in Nasty-Toe-Cheese for stat rape.’ Nasty-Toe-Cheese was what they called Natchitoches prison.
[US]J. Ellroy (con. 1962) Enchanters 7: His perv sheet dates back to 1938/ He’s a stat rape-o and psycho snout diver.