Green’s Dictionary of Slang

edison v.

[the inventor of the electric light, Thomas Alva Edison (1847–1931): it is presumably ‘shone’ on the interrogatee]

(US) to interrogate.

[US]Edwardsville Intelligencer (IL) 14 Sept. 4/4: The Flappers’ Dictionary [...] Edisoned: Being asked a lot of questions.