There's a true American saga on screens this weekend.
Twelve Years a Slave tells the story of Solomon Northup. He was an African-American musician from New York — a free man, until he was kidnapped in Washington, D.C., and sold into slavery. After an unlikely rescue from a Louisiana cotton plantation, he returned home and wrote a memoir, first published 160 years ago.
But the end of Northup's story is an unsolved mystery that has confounded historians for years.