Elizabeth Smart Verdict: Kidnapper Found Guilty, by Jennifer Dobner, Huffington Post (December 10, 2010). A federal jury found Brian David Mitchell guilty eight years after he abducted then 14-year-old Elizabeth Smart from her Salt Lake City bed at knifepoint. Mitchell conducted a hasty ‘marriage’ ceremony before raping Elizabeth. He tethered her between two trees and threatened to kill her and her family should she attempt to escape. Elizabeth spent the next nine months as the ‘plural wife’ and prisoner of her rapist, a homeless street preacher, who repeatedly sexually assaulted her.